diff --git a/examples/apollo-server/tsconfig.json b/examples/apollo-server/tsconfig.json
index a0de5f60..b481663c 100644
--- a/examples/apollo-server/tsconfig.json
+++ b/examples/apollo-server/tsconfig.json
@@ -1,7 +1,6 @@
 {
   "grats": {
-    "nullableByDefault": false,
-    "importModuleSpecifierEnding": ".js"
+    "nullableByDefault": false
   },
   "compilerOptions": {
     "outDir": "dist",
diff --git a/examples/express-graphql-http/tsconfig.json b/examples/express-graphql-http/tsconfig.json
index 7e1447a3..7869c561 100644
--- a/examples/express-graphql-http/tsconfig.json
+++ b/examples/express-graphql-http/tsconfig.json
@@ -1,7 +1,6 @@
 {
   "grats": {
-    "nullableByDefault": false,
-    "importModuleSpecifierEnding": ".js"
+    "nullableByDefault": false
   },
   "compilerOptions": {
     "outDir": "dist",
diff --git a/examples/incremental-migration/tsconfig.json b/examples/incremental-migration/tsconfig.json
index a05563ce..d28abac2 100644
--- a/examples/incremental-migration/tsconfig.json
+++ b/examples/incremental-migration/tsconfig.json
@@ -4,8 +4,7 @@
     "tsSchema": "./schemas/gratsGeneratedSchema.ts",
     "graphqlSchema": "gratsSchema.graphql",
     "tsSchemaHeader": "// DO NOT USE DIRECTLY. Prefer the merged schema in `./mergedSchema.ts`.",
-    "schemaHeader": "# DO NOT USE DIRECTLY. Prefer the merged schema in `../schema.graphql`.",
-    "importModuleSpecifierEnding": ".js"
+    "schemaHeader": "# DO NOT USE DIRECTLY. Prefer the merged schema in `../schema.graphql`."
   },
   "compilerOptions": {
     "outDir": "dist",
diff --git a/examples/production-app/tsconfig.json b/examples/production-app/tsconfig.json
index 79dc2a64..5f7c2e7d 100644
--- a/examples/production-app/tsconfig.json
+++ b/examples/production-app/tsconfig.json
@@ -1,7 +1,5 @@
 {
-  "grats": {
-    "importModuleSpecifierEnding": ".js"
-  },
+  "grats": {},
   "compilerOptions": {
     "outDir": "dist",
     "module": "NodeNext",
diff --git a/examples/strict-semantic-nullability/tsconfig.json b/examples/strict-semantic-nullability/tsconfig.json
index 6cd133aa..609f9758 100644
--- a/examples/strict-semantic-nullability/tsconfig.json
+++ b/examples/strict-semantic-nullability/tsconfig.json
@@ -1,8 +1,7 @@
 {
   "grats": {
     "nullableByDefault": true,
-    "strictSemanticNullability": true,
-    "importModuleSpecifierEnding": ".js"
+    "strictSemanticNullability": true
   },
   "compilerOptions": {
     "outDir": "dist",
diff --git a/examples/yoga/tsconfig.json b/examples/yoga/tsconfig.json
index 7e1447a3..7869c561 100644
--- a/examples/yoga/tsconfig.json
+++ b/examples/yoga/tsconfig.json
@@ -1,7 +1,6 @@
 {
   "grats": {
-    "nullableByDefault": false,
-    "importModuleSpecifierEnding": ".js"
+    "nullableByDefault": false
   },
   "compilerOptions": {
     "outDir": "dist",
diff --git a/llm-docs/getting-started/configuration.md b/llm-docs/getting-started/configuration.md
index 11d2e884..32b4fbd0 100644
--- a/llm-docs/getting-started/configuration.md
+++ b/llm-docs/getting-started/configuration.md
@@ -122,11 +122,9 @@ Default:
 
 ### "importModuleSpecifierEnding": string
 
-This option allows you configure an extension that will be appended to the end of all import paths in the generated TypeScript schema file.
+The extension appended to the end of all import paths in the generated TypeScript schema file. Defaults to `.js` which works for both CommonJS and ES module projects. Set to an empty string to omit the extension.
 
-When building a package that uses ES modules, import paths must not omit the file extension. In TypeScript code this generally means import paths must end with `.js`. If set to null, no ending will be appended.
-
-Default: `""`
+Default: `".js"`
 
 * * *
 
diff --git a/scripts/TGratsConfig.ts b/scripts/TGratsConfig.ts
index d6efa30f..1e42e61a 100644
--- a/scripts/TGratsConfig.ts
+++ b/scripts/TGratsConfig.ts
@@ -71,11 +71,9 @@ export type GratsConfig = {
    */
   tsClientEnumsHeader: string | null;
   /**
-   * This option allows you configure an extension that will be appended to
-   * the end of all import paths in the generated TypeScript schema file.
-   * When building a package that uses ES modules, import paths must not
-   * omit the file extension. In TypeScript code this generally means import
-   * paths must end with `.js`. If set to null, no ending will be appended.
+   * The extension appended to the end of all import paths in the generated
+   * TypeScript schema file. Defaults to `.js` which works for both CommonJS
+   * and ES module projects. Set to an empty string to omit the extension.
    */
   importModuleSpecifierEnding: string;
   /**
diff --git a/src/configSpecRaw.json b/src/configSpecRaw.json
index f1d2fdc0..01db1f66 100644
--- a/src/configSpecRaw.json
+++ b/src/configSpecRaw.json
@@ -56,10 +56,10 @@
       "default": "/**\n * TypeScript enum definitions generated by Grats (https://grats.capt.dev)\n * Do not manually edit. Regenerate by running `npx grats`.\n */"
     },
     "importModuleSpecifierEnding": {
-      "description": "This option allows you configure an extension that will be appended to the end of all import paths in the generated TypeScript schema file.\nWhen building a package that uses ES modules, import paths must not omit the file extension. In TypeScript code this generally means import paths must end with `.js`. If set to null, no ending will be appended.",
+      "description": "The extension appended to the end of all import paths in the generated TypeScript schema file. Defaults to `.js` which works for both CommonJS and ES module projects. Set to an empty string to omit the extension.",
       "type": { "kind": "string" },
       "nullable": false,
-      "default": ""
+      "default": ".js"
     },
     "EXPERIMENTAL__emitMetadata": {
       "description": "EXPERIMENTAL: THIS OPTION WILL BE RENAMED OR REMOVED IN A FUTURE RELEASE\nEmit a JSON file alongside the generated schema file which contains the metadata containing information about the resolvers.",
diff --git a/src/tests/configParserFixtures/empty.json.expected.md b/src/tests/configParserFixtures/empty.json.expected.md
index 3d8c5c83..42e0fa7b 100644
--- a/src/tests/configParserFixtures/empty.json.expected.md
+++ b/src/tests/configParserFixtures/empty.json.expected.md
@@ -21,7 +21,7 @@
   "schemaHeader": "# Schema generated by Grats (https://grats.capt.dev)\n# Do not manually edit. Regenerate by running `npx grats`.",
   "tsSchemaHeader": "/**\n * Executable schema generated by Grats (https://grats.capt.dev)\n * Do not manually edit. Regenerate by running `npx grats`.\n */",
   "tsClientEnumsHeader": "/**\n * TypeScript enum definitions generated by Grats (https://grats.capt.dev)\n * Do not manually edit. Regenerate by running `npx grats`.\n */",
-  "importModuleSpecifierEnding": "",
+  "importModuleSpecifierEnding": ".js",
   "EXPERIMENTAL__emitMetadata": false,
   "EXPERIMENTAL__emitResolverMap": false
 }
diff --git a/src/tests/configParserFixtures/experimentalField.json.expected.md b/src/tests/configParserFixtures/experimentalField.json.expected.md
index 3df71cde..b3f978a5 100644
--- a/src/tests/configParserFixtures/experimentalField.json.expected.md
+++ b/src/tests/configParserFixtures/experimentalField.json.expected.md
@@ -23,7 +23,7 @@
   "schemaHeader": "# Schema generated by Grats (https://grats.capt.dev)\n# Do not manually edit. Regenerate by running `npx grats`.",
   "tsSchemaHeader": "/**\n * Executable schema generated by Grats (https://grats.capt.dev)\n * Do not manually edit. Regenerate by running `npx grats`.\n */",
   "tsClientEnumsHeader": "/**\n * TypeScript enum definitions generated by Grats (https://grats.capt.dev)\n * Do not manually edit. Regenerate by running `npx grats`.\n */",
-  "importModuleSpecifierEnding": "",
+  "importModuleSpecifierEnding": ".js",
   "EXPERIMENTAL__emitMetadata": true,
   "EXPERIMENTAL__emitResolverMap": false
 }
diff --git a/src/tests/configParserFixtures/multiLineHeader.json.expected.md b/src/tests/configParserFixtures/multiLineHeader.json.expected.md
index 94ea0be6..d5cd4f51 100644
--- a/src/tests/configParserFixtures/multiLineHeader.json.expected.md
+++ b/src/tests/configParserFixtures/multiLineHeader.json.expected.md
@@ -23,7 +23,7 @@
   "schemaHeader": "/**\n * An amazing GraphQL schema\n */",
   "tsSchemaHeader": "/**\n * Executable schema generated by Grats (https://grats.capt.dev)\n * Do not manually edit. Regenerate by running `npx grats`.\n */",
   "tsClientEnumsHeader": "/**\n * TypeScript enum definitions generated by Grats (https://grats.capt.dev)\n * Do not manually edit. Regenerate by running `npx grats`.\n */",
-  "importModuleSpecifierEnding": "",
+  "importModuleSpecifierEnding": ".js",
   "EXPERIMENTAL__emitMetadata": false,
   "EXPERIMENTAL__emitResolverMap": false
 }
diff --git a/src/tests/fixtures/arguments/CustomScalarArgument.ts.expected.md b/src/tests/fixtures/arguments/CustomScalarArgument.ts.expected.md
index fe961611..7e912bad 100644
--- a/src/tests/fixtures/arguments/CustomScalarArgument.ts.expected.md
+++ b/src/tests/fixtures/arguments/CustomScalarArgument.ts.expected.md
@@ -31,7 +31,7 @@ type SomeType {
 
 ```ts
 import type { GqlScalar } from "grats";
-import type { MyString as MyStringInternal } from "./CustomScalarArgument";
+import type { MyString as MyStringInternal } from "./CustomScalarArgument.js";
 import { GraphQLSchema, GraphQLScalarType, GraphQLObjectType, GraphQLString, GraphQLNonNull } from "graphql";
 export type SchemaConfig = {
     scalars: {
diff --git a/src/tests/fixtures/custom_scalars/DefineCustomScalar.ts.expected.md b/src/tests/fixtures/custom_scalars/DefineCustomScalar.ts.expected.md
index 2d75f30a..680c7dd5 100644
--- a/src/tests/fixtures/custom_scalars/DefineCustomScalar.ts.expected.md
+++ b/src/tests/fixtures/custom_scalars/DefineCustomScalar.ts.expected.md
@@ -29,7 +29,7 @@ type SomeType {
 
 ```ts
 import type { GqlScalar } from "grats";
-import type { MyUrl as MyUrlInternal } from "./DefineCustomScalar";
+import type { MyUrl as MyUrlInternal } from "./DefineCustomScalar.js";
 import { GraphQLSchema, GraphQLScalarType, GraphQLObjectType, GraphQLString } from "graphql";
 export type SchemaConfig = {
     scalars: {
diff --git a/src/tests/fixtures/custom_scalars/DefineCustomScalarWithDescription.ts.expected.md b/src/tests/fixtures/custom_scalars/DefineCustomScalarWithDescription.ts.expected.md
index a3979d49..568c82f2 100644
--- a/src/tests/fixtures/custom_scalars/DefineCustomScalarWithDescription.ts.expected.md
+++ b/src/tests/fixtures/custom_scalars/DefineCustomScalarWithDescription.ts.expected.md
@@ -33,7 +33,7 @@ type SomeType {
 
 ```ts
 import type { GqlScalar } from "grats";
-import type { MyUrl as MyUrlInternal } from "./DefineCustomScalarWithDescription";
+import type { MyUrl as MyUrlInternal } from "./DefineCustomScalarWithDescription.js";
 import { GraphQLSchema, GraphQLScalarType, GraphQLObjectType, GraphQLString } from "graphql";
 export type SchemaConfig = {
     scalars: {
diff --git a/src/tests/fixtures/custom_scalars/DefineRenamedCustomScalar.ts.expected.md b/src/tests/fixtures/custom_scalars/DefineRenamedCustomScalar.ts.expected.md
index 6899daf6..9da31ae4 100644
--- a/src/tests/fixtures/custom_scalars/DefineRenamedCustomScalar.ts.expected.md
+++ b/src/tests/fixtures/custom_scalars/DefineRenamedCustomScalar.ts.expected.md
@@ -29,7 +29,7 @@ type SomeType {
 
 ```ts
 import type { GqlScalar } from "grats";
-import type { MyUrl as CustomNameInternal } from "./DefineRenamedCustomScalar";
+import type { MyUrl as CustomNameInternal } from "./DefineRenamedCustomScalar.js";
 import { GraphQLSchema, GraphQLScalarType, GraphQLObjectType, GraphQLString } from "graphql";
 export type SchemaConfig = {
     scalars: {
diff --git a/src/tests/fixtures/custom_scalars/SpecifiedBy.ts.expected.md b/src/tests/fixtures/custom_scalars/SpecifiedBy.ts.expected.md
index 384181b9..6ce0c225 100644
--- a/src/tests/fixtures/custom_scalars/SpecifiedBy.ts.expected.md
+++ b/src/tests/fixtures/custom_scalars/SpecifiedBy.ts.expected.md
@@ -22,7 +22,7 @@ scalar UUID @specifiedBy(url: "https://tools.ietf.org/html/rfc4122")
 
 ```ts
 import type { GqlScalar } from "grats";
-import type { UUID as UUIDInternal } from "./SpecifiedBy";
+import type { UUID as UUIDInternal } from "./SpecifiedBy.js";
 import { GraphQLSchema, GraphQLScalarType } from "graphql";
 export type SchemaConfig = {
     scalars: {
diff --git a/src/tests/fixtures/derived_context/derivedContextPromiseValid.ts.expected.md b/src/tests/fixtures/derived_context/derivedContextPromiseValid.ts.expected.md
index 10b83e3d..6856bcd8 100644
--- a/src/tests/fixtures/derived_context/derivedContextPromiseValid.ts.expected.md
+++ b/src/tests/fixtures/derived_context/derivedContextPromiseValid.ts.expected.md
@@ -39,7 +39,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as queryGreetingResolver, createDerivedContext } from "./derivedContextPromiseValid";
+import { greeting as queryGreetingResolver, createDerivedContext } from "./derivedContextPromiseValid.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/derived_context/derivedContextUsedMultipleTimes.ts.expected.md b/src/tests/fixtures/derived_context/derivedContextUsedMultipleTimes.ts.expected.md
index 2a10d5bd..548272e6 100644
--- a/src/tests/fixtures/derived_context/derivedContextUsedMultipleTimes.ts.expected.md
+++ b/src/tests/fixtures/derived_context/derivedContextUsedMultipleTimes.ts.expected.md
@@ -46,7 +46,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { farewell as queryFarewellResolver, greetingContext, greeting as queryGreetingResolver } from "./derivedContextUsedMultipleTimes";
+import { farewell as queryFarewellResolver, greetingContext, greeting as queryGreetingResolver } from "./derivedContextUsedMultipleTimes.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/derived_context/nestedAsyncDerivedContext.ts.expected.md b/src/tests/fixtures/derived_context/nestedAsyncDerivedContext.ts.expected.md
index b32abb54..0cefc697 100644
--- a/src/tests/fixtures/derived_context/nestedAsyncDerivedContext.ts.expected.md
+++ b/src/tests/fixtures/derived_context/nestedAsyncDerivedContext.ts.expected.md
@@ -49,7 +49,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as queryGreetingResolver, createDerivedContext2, createDerivedContext1 } from "./nestedAsyncDerivedContext";
+import { greeting as queryGreetingResolver, createDerivedContext2, createDerivedContext1 } from "./nestedAsyncDerivedContext.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/derived_context/simpleDerivedContext.ts.expected.md b/src/tests/fixtures/derived_context/simpleDerivedContext.ts.expected.md
index b30322c2..1285c227 100644
--- a/src/tests/fixtures/derived_context/simpleDerivedContext.ts.expected.md
+++ b/src/tests/fixtures/derived_context/simpleDerivedContext.ts.expected.md
@@ -40,7 +40,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as queryGreetingResolver, createDerivedContext } from "./simpleDerivedContext";
+import { greeting as queryGreetingResolver, createDerivedContext } from "./simpleDerivedContext.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/derived_context/simpleDerivedContextNoArgs.ts.expected.md b/src/tests/fixtures/derived_context/simpleDerivedContextNoArgs.ts.expected.md
index fa2330da..2b6ff7a3 100644
--- a/src/tests/fixtures/derived_context/simpleDerivedContextNoArgs.ts.expected.md
+++ b/src/tests/fixtures/derived_context/simpleDerivedContextNoArgs.ts.expected.md
@@ -40,7 +40,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as queryGreetingResolver, createDerivedContext } from "./simpleDerivedContextNoArgs";
+import { greeting as queryGreetingResolver, createDerivedContext } from "./simpleDerivedContextNoArgs.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/directives/directiveOnArgumentDefinition.ts.expected.md b/src/tests/fixtures/directives/directiveOnArgumentDefinition.ts.expected.md
index 2cc5ba7f..2eaf465b 100644
--- a/src/tests/fixtures/directives/directiveOnArgumentDefinition.ts.expected.md
+++ b/src/tests/fixtures/directives/directiveOnArgumentDefinition.ts.expected.md
@@ -39,7 +39,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLDirective, DirectiveLocation, GraphQLNonNull, GraphQLInt, specifiedDirectives, GraphQLObjectType, GraphQLString } from "graphql";
-import { likes as queryLikesResolver } from "./directiveOnArgumentDefinition";
+import { likes as queryLikesResolver } from "./directiveOnArgumentDefinition.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/directives/directiveOnFieldDefinition.ts.expected.md b/src/tests/fixtures/directives/directiveOnFieldDefinition.ts.expected.md
index 990a6d07..47179deb 100644
--- a/src/tests/fixtures/directives/directiveOnFieldDefinition.ts.expected.md
+++ b/src/tests/fixtures/directives/directiveOnFieldDefinition.ts.expected.md
@@ -38,7 +38,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLDirective, DirectiveLocation, GraphQLNonNull, GraphQLInt, specifiedDirectives, GraphQLObjectType, GraphQLString } from "graphql";
-import { likes as queryLikesResolver } from "./directiveOnFieldDefinition";
+import { likes as queryLikesResolver } from "./directiveOnFieldDefinition.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/directives/directiveOnScalar.ts.expected.md b/src/tests/fixtures/directives/directiveOnScalar.ts.expected.md
index 2b7aae1e..2fc5f8eb 100644
--- a/src/tests/fixtures/directives/directiveOnScalar.ts.expected.md
+++ b/src/tests/fixtures/directives/directiveOnScalar.ts.expected.md
@@ -32,7 +32,7 @@ scalar MyScalar @max(foo: 10)
 
 ```ts
 import type { GqlScalar } from "grats";
-import type { MyScalar as MyScalarInternal } from "./directiveOnScalar";
+import type { MyScalar as MyScalarInternal } from "./directiveOnScalar.js";
 import { GraphQLSchema, GraphQLDirective, DirectiveLocation, GraphQLNonNull, GraphQLInt, specifiedDirectives, GraphQLScalarType } from "graphql";
 export type SchemaConfig = {
     scalars: {
diff --git a/src/tests/fixtures/directives/undefinedDirectiveWithoutArgs.ts.expected.md b/src/tests/fixtures/directives/undefinedDirectiveWithoutArgs.ts.expected.md
index 372b93dd..96cdc91d 100644
--- a/src/tests/fixtures/directives/undefinedDirectiveWithoutArgs.ts.expected.md
+++ b/src/tests/fixtures/directives/undefinedDirectiveWithoutArgs.ts.expected.md
@@ -26,7 +26,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { myQueryField as queryMyQueryFieldResolver } from "./undefinedDirectiveWithoutArgs";
+import { myQueryField as queryMyQueryFieldResolver } from "./undefinedDirectiveWithoutArgs.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/enums/NonNullEnumDefault.ts.expected.md b/src/tests/fixtures/enums/NonNullEnumDefault.ts.expected.md
index a61bd2ee..863e5de2 100644
--- a/src/tests/fixtures/enums/NonNullEnumDefault.ts.expected.md
+++ b/src/tests/fixtures/enums/NonNullEnumDefault.ts.expected.md
@@ -34,7 +34,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLNonNull, GraphQLEnumType } from "graphql";
-import { hello as queryHelloResolver } from "./NonNullEnumDefault";
+import { hello as queryHelloResolver } from "./NonNullEnumDefault.js";
 export function getSchema(): GraphQLSchema {
     const GreetingOptionsType: GraphQLEnumType = new GraphQLEnumType({
         name: "GreetingOptions",
diff --git a/src/tests/fixtures/enums/NonNullEnumDefaultInInputObject.ts.expected.md b/src/tests/fixtures/enums/NonNullEnumDefaultInInputObject.ts.expected.md
index 05de79b4..99609468 100644
--- a/src/tests/fixtures/enums/NonNullEnumDefaultInInputObject.ts.expected.md
+++ b/src/tests/fixtures/enums/NonNullEnumDefaultInInputObject.ts.expected.md
@@ -45,7 +45,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLNonNull, GraphQLInputObjectType, GraphQLEnumType } from "graphql";
-import { hello as queryHelloResolver } from "./NonNullEnumDefaultInInputObject";
+import { hello as queryHelloResolver } from "./NonNullEnumDefaultInInputObject.js";
 export function getSchema(): GraphQLSchema {
     const GreetingOptionsType: GraphQLEnumType = new GraphQLEnumType({
         name: "GreetingOptions",
diff --git a/src/tests/fixtures/enums/NonNullPluralEnumDefaults.ts.expected.md b/src/tests/fixtures/enums/NonNullPluralEnumDefaults.ts.expected.md
index 4dd4f389..9be1a520 100644
--- a/src/tests/fixtures/enums/NonNullPluralEnumDefaults.ts.expected.md
+++ b/src/tests/fixtures/enums/NonNullPluralEnumDefaults.ts.expected.md
@@ -36,7 +36,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLNonNull, GraphQLList, GraphQLEnumType } from "graphql";
-import { hello as queryHelloResolver } from "./NonNullPluralEnumDefaults";
+import { hello as queryHelloResolver } from "./NonNullPluralEnumDefaults.js";
 export function getSchema(): GraphQLSchema {
     const GreetingOptionsType: GraphQLEnumType = new GraphQLEnumType({
         name: "GreetingOptions",
diff --git a/src/tests/fixtures/enums/NonNullTsEnumDefault.ts.expected.md b/src/tests/fixtures/enums/NonNullTsEnumDefault.ts.expected.md
index aecf3a08..96355a69 100644
--- a/src/tests/fixtures/enums/NonNullTsEnumDefault.ts.expected.md
+++ b/src/tests/fixtures/enums/NonNullTsEnumDefault.ts.expected.md
@@ -41,7 +41,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLNonNull, GraphQLEnumType } from "graphql";
-import { hello as queryHelloResolver } from "./NonNullTsEnumDefault";
+import { hello as queryHelloResolver } from "./NonNullTsEnumDefault.js";
 export function getSchema(): GraphQLSchema {
     const GreetingOptionsType: GraphQLEnumType = new GraphQLEnumType({
         name: "GreetingOptions",
diff --git a/src/tests/fixtures/enums/NonNullTsEnumDefaultStringLiteral.ts.expected.md b/src/tests/fixtures/enums/NonNullTsEnumDefaultStringLiteral.ts.expected.md
index 135aae57..6d7d36fe 100644
--- a/src/tests/fixtures/enums/NonNullTsEnumDefaultStringLiteral.ts.expected.md
+++ b/src/tests/fixtures/enums/NonNullTsEnumDefaultStringLiteral.ts.expected.md
@@ -41,7 +41,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLNonNull, GraphQLEnumType } from "graphql";
-import { hello as queryHelloResolver } from "./NonNullTsEnumDefaultStringLiteral";
+import { hello as queryHelloResolver } from "./NonNullTsEnumDefaultStringLiteral.js";
 export function getSchema(): GraphQLSchema {
     const GreetingOptionsType: GraphQLEnumType = new GraphQLEnumType({
         name: "GreetingOptions",
diff --git a/src/tests/fixtures/examples/playground.ts.expected.md b/src/tests/fixtures/examples/playground.ts.expected.md
index ad0b8e04..b5399267 100644
--- a/src/tests/fixtures/examples/playground.ts.expected.md
+++ b/src/tests/fixtures/examples/playground.ts.expected.md
@@ -60,7 +60,7 @@ type User {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLNonNull } from "graphql";
-import { getUser as someTypeGetUserResolver } from "./playground";
+import { getUser as someTypeGetUserResolver } from "./playground.js";
 export function getSchema(): GraphQLSchema {
     const UserType: GraphQLObjectType = new GraphQLObjectType({
         name: "User",
diff --git a/src/tests/fixtures/examples/readme.ts.expected.md b/src/tests/fixtures/examples/readme.ts.expected.md
index 95b51c82..5af0f177 100644
--- a/src/tests/fixtures/examples/readme.ts.expected.md
+++ b/src/tests/fixtures/examples/readme.ts.expected.md
@@ -54,7 +54,7 @@ type User {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLNonNull } from "graphql";
-import { me as queryMeResolver, viewer as queryViewerResolver } from "./readme";
+import { me as queryMeResolver, viewer as queryViewerResolver } from "./readme.js";
 export function getSchema(): GraphQLSchema {
     const UserType: GraphQLObjectType = new GraphQLObjectType({
         name: "User",
diff --git a/src/tests/fixtures/extend_interface/addStringFieldToInterface.ts.expected.md b/src/tests/fixtures/extend_interface/addStringFieldToInterface.ts.expected.md
index a3ae65bf..685340a7 100644
--- a/src/tests/fixtures/extend_interface/addStringFieldToInterface.ts.expected.md
+++ b/src/tests/fixtures/extend_interface/addStringFieldToInterface.ts.expected.md
@@ -57,7 +57,7 @@ type User implements IPerson {
 
 ```ts
 import { GraphQLSchema, GraphQLInterfaceType, GraphQLString, GraphQLObjectType } from "graphql";
-import { greeting as adminGreetingResolver, greeting as userGreetingResolver } from "./addStringFieldToInterface";
+import { greeting as adminGreetingResolver, greeting as userGreetingResolver } from "./addStringFieldToInterface.js";
 export function getSchema(): GraphQLSchema {
     const IPersonType: GraphQLInterfaceType = new GraphQLInterfaceType({
         name: "IPerson",
diff --git a/src/tests/fixtures/extend_interface/addStringFieldToInterfaceImplementedByInterface.ts.expected.md b/src/tests/fixtures/extend_interface/addStringFieldToInterfaceImplementedByInterface.ts.expected.md
index 76203769..8488914c 100644
--- a/src/tests/fixtures/extend_interface/addStringFieldToInterfaceImplementedByInterface.ts.expected.md
+++ b/src/tests/fixtures/extend_interface/addStringFieldToInterfaceImplementedByInterface.ts.expected.md
@@ -63,7 +63,7 @@ type User implements IPerson & IThing {
 
 ```ts
 import { GraphQLSchema, GraphQLInterfaceType, GraphQLString, GraphQLObjectType } from "graphql";
-import { greeting as adminGreetingResolver, greeting as userGreetingResolver } from "./addStringFieldToInterfaceImplementedByInterface";
+import { greeting as adminGreetingResolver, greeting as userGreetingResolver } from "./addStringFieldToInterfaceImplementedByInterface.js";
 export function getSchema(): GraphQLSchema {
     const IThingType: GraphQLInterfaceType = new GraphQLInterfaceType({
         name: "IThing",
diff --git a/src/tests/fixtures/extend_type/addDeprecatedField.ts.expected.md b/src/tests/fixtures/extend_type/addDeprecatedField.ts.expected.md
index 2c2eea4b..0768213b 100644
--- a/src/tests/fixtures/extend_type/addDeprecatedField.ts.expected.md
+++ b/src/tests/fixtures/extend_type/addDeprecatedField.ts.expected.md
@@ -31,7 +31,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as someTypeGreetingResolver } from "./addDeprecatedField";
+import { greeting as someTypeGreetingResolver } from "./addDeprecatedField.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/extend_type/addFieldWithArguments.ts.expected.md b/src/tests/fixtures/extend_type/addFieldWithArguments.ts.expected.md
index d1bfd965..a35492b1 100644
--- a/src/tests/fixtures/extend_type/addFieldWithArguments.ts.expected.md
+++ b/src/tests/fixtures/extend_type/addFieldWithArguments.ts.expected.md
@@ -28,7 +28,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLNonNull } from "graphql";
-import { greeting as someTypeGreetingResolver } from "./addFieldWithArguments";
+import { greeting as someTypeGreetingResolver } from "./addFieldWithArguments.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/extend_type/addFieldWithDescription.ts.expected.md b/src/tests/fixtures/extend_type/addFieldWithDescription.ts.expected.md
index b1583bac..42b2c25e 100644
--- a/src/tests/fixtures/extend_type/addFieldWithDescription.ts.expected.md
+++ b/src/tests/fixtures/extend_type/addFieldWithDescription.ts.expected.md
@@ -32,7 +32,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as someTypeGreetingResolver } from "./addFieldWithDescription";
+import { greeting as someTypeGreetingResolver } from "./addFieldWithDescription.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/extend_type/addRenamedFieldToSomeType.ts.expected.md b/src/tests/fixtures/extend_type/addRenamedFieldToSomeType.ts.expected.md
index 7d3d312a..64ac460c 100644
--- a/src/tests/fixtures/extend_type/addRenamedFieldToSomeType.ts.expected.md
+++ b/src/tests/fixtures/extend_type/addRenamedFieldToSomeType.ts.expected.md
@@ -28,7 +28,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as someTypeHelloResolver } from "./addRenamedFieldToSomeType";
+import { greeting as someTypeHelloResolver } from "./addRenamedFieldToSomeType.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/extend_type/addStringFieldToSomeType.ts.expected.md b/src/tests/fixtures/extend_type/addStringFieldToSomeType.ts.expected.md
index 560a641c..e59b0b17 100644
--- a/src/tests/fixtures/extend_type/addStringFieldToSomeType.ts.expected.md
+++ b/src/tests/fixtures/extend_type/addStringFieldToSomeType.ts.expected.md
@@ -28,7 +28,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as someTypeGreetingResolver } from "./addStringFieldToSomeType";
+import { greeting as someTypeGreetingResolver } from "./addStringFieldToSomeType.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/extend_type/defaultExport.ts.expected.md b/src/tests/fixtures/extend_type/defaultExport.ts.expected.md
index 51e12909..493c4647 100644
--- a/src/tests/fixtures/extend_type/defaultExport.ts.expected.md
+++ b/src/tests/fixtures/extend_type/defaultExport.ts.expected.md
@@ -27,7 +27,7 @@ type SomeType {
 ### TypeScript
 
 ```ts
-import someTypeGreetingResolver from "./defaultExport";
+import someTypeGreetingResolver from "./defaultExport.js";
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
diff --git a/src/tests/fixtures/extend_type/fieldAsExportedArrowFunction.ts.expected.md b/src/tests/fixtures/extend_type/fieldAsExportedArrowFunction.ts.expected.md
index 81308322..0a5479b4 100644
--- a/src/tests/fixtures/extend_type/fieldAsExportedArrowFunction.ts.expected.md
+++ b/src/tests/fixtures/extend_type/fieldAsExportedArrowFunction.ts.expected.md
@@ -28,7 +28,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as someTypeGreetingResolver } from "./fieldAsExportedArrowFunction";
+import { greeting as someTypeGreetingResolver } from "./fieldAsExportedArrowFunction.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/extend_type/fieldAsExportedArrowFunctionPositionalArgs.ts.expected.md b/src/tests/fixtures/extend_type/fieldAsExportedArrowFunctionPositionalArgs.ts.expected.md
index 1d6081b1..1144947c 100644
--- a/src/tests/fixtures/extend_type/fieldAsExportedArrowFunctionPositionalArgs.ts.expected.md
+++ b/src/tests/fixtures/extend_type/fieldAsExportedArrowFunctionPositionalArgs.ts.expected.md
@@ -28,7 +28,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLNonNull } from "graphql";
-import { greeting as someTypeGreetingResolver } from "./fieldAsExportedArrowFunctionPositionalArgs";
+import { greeting as someTypeGreetingResolver } from "./fieldAsExportedArrowFunctionPositionalArgs.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/extend_type/fieldAsExportedAsyncArrowFunction.ts.expected.md b/src/tests/fixtures/extend_type/fieldAsExportedAsyncArrowFunction.ts.expected.md
index 291d593d..f8bcb405 100644
--- a/src/tests/fixtures/extend_type/fieldAsExportedAsyncArrowFunction.ts.expected.md
+++ b/src/tests/fixtures/extend_type/fieldAsExportedAsyncArrowFunction.ts.expected.md
@@ -28,7 +28,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as someTypeGreetingResolver } from "./fieldAsExportedAsyncArrowFunction";
+import { greeting as someTypeGreetingResolver } from "./fieldAsExportedAsyncArrowFunction.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/extend_type/functionFieldOnTypeDefinedWithInterface.ts.expected.md b/src/tests/fixtures/extend_type/functionFieldOnTypeDefinedWithInterface.ts.expected.md
index be9030a7..c50101d8 100644
--- a/src/tests/fixtures/extend_type/functionFieldOnTypeDefinedWithInterface.ts.expected.md
+++ b/src/tests/fixtures/extend_type/functionFieldOnTypeDefinedWithInterface.ts.expected.md
@@ -28,7 +28,7 @@ type Cat {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { catSound as catCatSoundResolver } from "./functionFieldOnTypeDefinedWithInterface";
+import { catSound as catCatSoundResolver } from "./functionFieldOnTypeDefinedWithInterface.js";
 export function getSchema(): GraphQLSchema {
     const CatType: GraphQLObjectType = new GraphQLObjectType({
         name: "Cat",
diff --git a/src/tests/fixtures/extend_type/optionalModelType.ts.expected.md b/src/tests/fixtures/extend_type/optionalModelType.ts.expected.md
index 8c81b5ac..25e90acd 100644
--- a/src/tests/fixtures/extend_type/optionalModelType.ts.expected.md
+++ b/src/tests/fixtures/extend_type/optionalModelType.ts.expected.md
@@ -35,7 +35,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as someTypeGreetingResolver } from "./optionalModelType";
+import { greeting as someTypeGreetingResolver } from "./optionalModelType.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/field_definitions/FieldAsStaticClassMethod.ts.expected.md b/src/tests/fixtures/field_definitions/FieldAsStaticClassMethod.ts.expected.md
index 5ce926c4..86bee804 100644
--- a/src/tests/fixtures/field_definitions/FieldAsStaticClassMethod.ts.expected.md
+++ b/src/tests/fixtures/field_definitions/FieldAsStaticClassMethod.ts.expected.md
@@ -36,7 +36,7 @@ type User {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { User as queryGetUserResolver } from "./FieldAsStaticClassMethod";
+import { User as queryGetUserResolver } from "./FieldAsStaticClassMethod.js";
 export function getSchema(): GraphQLSchema {
     const UserType: GraphQLObjectType = new GraphQLObjectType({
         name: "User",
diff --git a/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodOnNonGqlClass.ts.expected.md b/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodOnNonGqlClass.ts.expected.md
index e07a8a8b..be69d860 100644
--- a/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodOnNonGqlClass.ts.expected.md
+++ b/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodOnNonGqlClass.ts.expected.md
@@ -28,7 +28,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { SomeClass as queryGreetResolver } from "./FieldAsStaticClassMethodOnNonGqlClass";
+import { SomeClass as queryGreetResolver } from "./FieldAsStaticClassMethodOnNonGqlClass.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodOnUnnamedNonGqlClass.ts.expected.md b/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodOnUnnamedNonGqlClass.ts.expected.md
index 1200e14b..bde089e0 100644
--- a/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodOnUnnamedNonGqlClass.ts.expected.md
+++ b/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodOnUnnamedNonGqlClass.ts.expected.md
@@ -27,7 +27,7 @@ type Query {
 ### TypeScript
 
 ```ts
-import queryGreetResolver from "./FieldAsStaticClassMethodOnUnnamedNonGqlClass";
+import queryGreetResolver from "./FieldAsStaticClassMethodOnUnnamedNonGqlClass.js";
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
diff --git a/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodWithClassAsDefaultExport.ts.expected.md b/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodWithClassAsDefaultExport.ts.expected.md
index 6f72c5d6..52579e12 100644
--- a/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodWithClassAsDefaultExport.ts.expected.md
+++ b/src/tests/fixtures/field_definitions/FieldAsStaticClassMethodWithClassAsDefaultExport.ts.expected.md
@@ -35,7 +35,7 @@ type User {
 ### TypeScript
 
 ```ts
-import queryGetUserResolver from "./FieldAsStaticClassMethodWithClassAsDefaultExport";
+import queryGetUserResolver from "./FieldAsStaticClassMethodWithClassAsDefaultExport.js";
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
 export function getSchema(): GraphQLSchema {
     const UserType: GraphQLObjectType = new GraphQLObjectType({
diff --git a/src/tests/fixtures/field_definitions/MultipleFieldsAsStaticClassMethods.ts.expected.md b/src/tests/fixtures/field_definitions/MultipleFieldsAsStaticClassMethods.ts.expected.md
index c894dfdc..b35e1bb8 100644
--- a/src/tests/fixtures/field_definitions/MultipleFieldsAsStaticClassMethods.ts.expected.md
+++ b/src/tests/fixtures/field_definitions/MultipleFieldsAsStaticClassMethods.ts.expected.md
@@ -42,7 +42,7 @@ type User {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLList, GraphQLNonNull } from "graphql";
-import { User as queryGetUserResolver, User as queryGetUsersResolver } from "./MultipleFieldsAsStaticClassMethods";
+import { User as queryGetUserResolver, User as queryGetUsersResolver } from "./MultipleFieldsAsStaticClassMethods.js";
 export function getSchema(): GraphQLSchema {
     const UserType: GraphQLObjectType = new GraphQLObjectType({
         name: "User",
diff --git a/src/tests/fixtures/field_values/CustomScalar.ts.expected.md b/src/tests/fixtures/field_values/CustomScalar.ts.expected.md
index 002b26db..85c8a265 100644
--- a/src/tests/fixtures/field_values/CustomScalar.ts.expected.md
+++ b/src/tests/fixtures/field_values/CustomScalar.ts.expected.md
@@ -31,7 +31,7 @@ type SomeType {
 
 ```ts
 import type { GqlScalar } from "grats";
-import type { MyString as MyStringInternal } from "./CustomScalar";
+import type { MyString as MyStringInternal } from "./CustomScalar.js";
 import { GraphQLSchema, GraphQLScalarType, GraphQLObjectType } from "graphql";
 export type SchemaConfig = {
     scalars: {
diff --git a/src/tests/fixtures/generics/defineFieldOnGeneric.ts.expected.md b/src/tests/fixtures/generics/defineFieldOnGeneric.ts.expected.md
index 652d0451..f61f0b88 100644
--- a/src/tests/fixtures/generics/defineFieldOnGeneric.ts.expected.md
+++ b/src/tests/fixtures/generics/defineFieldOnGeneric.ts.expected.md
@@ -46,7 +46,7 @@ type PageEdge {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { title as pageEdgeTitleResolver } from "./defineFieldOnGeneric";
+import { title as pageEdgeTitleResolver } from "./defineFieldOnGeneric.js";
 export function getSchema(): GraphQLSchema {
     const PageType: GraphQLObjectType = new GraphQLObjectType({
         name: "Page",
diff --git a/src/tests/fixtures/generics/genericOverArg.ts.expected.md b/src/tests/fixtures/generics/genericOverArg.ts.expected.md
index a3f2c044..d8883311 100644
--- a/src/tests/fixtures/generics/genericOverArg.ts.expected.md
+++ b/src/tests/fixtures/generics/genericOverArg.ts.expected.md
@@ -47,7 +47,7 @@ type SomeInputSomeClass {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLInputObjectType, GraphQLNonNull } from "graphql";
-import { someField as querySomeFieldResolver } from "./genericOverArg";
+import { someField as querySomeFieldResolver } from "./genericOverArg.js";
 export function getSchema(): GraphQLSchema {
     const SomeInputType: GraphQLInputObjectType = new GraphQLInputObjectType({
         name: "SomeInput",
diff --git a/src/tests/fixtures/generics/genericTypeUsingClass.ts.expected.md b/src/tests/fixtures/generics/genericTypeUsingClass.ts.expected.md
index 56f30bcb..b68ac2d6 100644
--- a/src/tests/fixtures/generics/genericTypeUsingClass.ts.expected.md
+++ b/src/tests/fixtures/generics/genericTypeUsingClass.ts.expected.md
@@ -49,7 +49,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { createEdge as queryCreateEdgeResolver } from "./genericTypeUsingClass";
+import { createEdge as queryCreateEdgeResolver } from "./genericTypeUsingClass.js";
 export function getSchema(): GraphQLSchema {
     const PageType: GraphQLObjectType = new GraphQLObjectType({
         name: "Page",
diff --git a/src/tests/fixtures/generics/genericTypeUsingInterface.ts.expected.md b/src/tests/fixtures/generics/genericTypeUsingInterface.ts.expected.md
index 024b6cf6..98b51051 100644
--- a/src/tests/fixtures/generics/genericTypeUsingInterface.ts.expected.md
+++ b/src/tests/fixtures/generics/genericTypeUsingInterface.ts.expected.md
@@ -49,7 +49,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { createEdge as queryCreateEdgeResolver } from "./genericTypeUsingInterface";
+import { createEdge as queryCreateEdgeResolver } from "./genericTypeUsingInterface.js";
 export function getSchema(): GraphQLSchema {
     const PageType: GraphQLObjectType = new GraphQLObjectType({
         name: "Page",
diff --git a/src/tests/fixtures/generics/multiparamGeneric.ts.expected.md b/src/tests/fixtures/generics/multiparamGeneric.ts.expected.md
index 89bf652a..696b4732 100644
--- a/src/tests/fixtures/generics/multiparamGeneric.ts.expected.md
+++ b/src/tests/fixtures/generics/multiparamGeneric.ts.expected.md
@@ -53,7 +53,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLUnionType, GraphQLString } from "graphql";
-import { pageResult as queryPageResultResolver } from "./multiparamGeneric";
+import { pageResult as queryPageResultResolver } from "./multiparamGeneric.js";
 export function getSchema(): GraphQLSchema {
     const ErrType: GraphQLObjectType = new GraphQLObjectType({
         name: "Err",
diff --git a/src/tests/fixtures/generics/names/skippedTypeParam.ts.expected.md b/src/tests/fixtures/generics/names/skippedTypeParam.ts.expected.md
index 25f42e89..66462e9e 100644
--- a/src/tests/fixtures/generics/names/skippedTypeParam.ts.expected.md
+++ b/src/tests/fixtures/generics/names/skippedTypeParam.ts.expected.md
@@ -57,7 +57,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { connection as queryConnectionResolver } from "./skippedTypeParam";
+import { connection as queryConnectionResolver } from "./skippedTypeParam.js";
 export function getSchema(): GraphQLSchema {
     const BType: GraphQLObjectType = new GraphQLObjectType({
         name: "B",
diff --git a/src/tests/fixtures/generics/names/skippedTypeParamPassesLiteral.ts.expected.md b/src/tests/fixtures/generics/names/skippedTypeParamPassesLiteral.ts.expected.md
index b1966091..6509e0cb 100644
--- a/src/tests/fixtures/generics/names/skippedTypeParamPassesLiteral.ts.expected.md
+++ b/src/tests/fixtures/generics/names/skippedTypeParamPassesLiteral.ts.expected.md
@@ -62,7 +62,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { connection as queryConnectionResolver } from "./skippedTypeParamPassesLiteral";
+import { connection as queryConnectionResolver } from "./skippedTypeParamPassesLiteral.js";
 export function getSchema(): GraphQLSchema {
     const BType: GraphQLObjectType = new GraphQLObjectType({
         name: "B",
diff --git a/src/tests/fixtures/generics/scalarWithGeneric.ts.expected.md b/src/tests/fixtures/generics/scalarWithGeneric.ts.expected.md
index 92482baf..b2c8d1d3 100644
--- a/src/tests/fixtures/generics/scalarWithGeneric.ts.expected.md
+++ b/src/tests/fixtures/generics/scalarWithGeneric.ts.expected.md
@@ -20,7 +20,7 @@ scalar MyScalar
 
 ```ts
 import type { GqlScalar } from "grats";
-import type { MyScalar as MyScalarInternal } from "./scalarWithGeneric";
+import type { MyScalar as MyScalarInternal } from "./scalarWithGeneric.js";
 import { GraphQLSchema, GraphQLScalarType } from "graphql";
 export type SchemaConfig = {
     scalars: {
diff --git a/src/tests/fixtures/resolver_context/FunctionWithContextValue.ts.expected.md b/src/tests/fixtures/resolver_context/FunctionWithContextValue.ts.expected.md
index d93427ef..32638b53 100644
--- a/src/tests/fixtures/resolver_context/FunctionWithContextValue.ts.expected.md
+++ b/src/tests/fixtures/resolver_context/FunctionWithContextValue.ts.expected.md
@@ -31,7 +31,7 @@ type User {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as userGreetingResolver } from "./FunctionWithContextValue";
+import { greeting as userGreetingResolver } from "./FunctionWithContextValue.js";
 export function getSchema(): GraphQLSchema {
     const UserType: GraphQLObjectType = new GraphQLObjectType({
         name: "User",
diff --git a/src/tests/fixtures/resolver_info/FunctionWithInfoValue.ts.expected.md b/src/tests/fixtures/resolver_info/FunctionWithInfoValue.ts.expected.md
index 5a7a21c9..ce882b89 100644
--- a/src/tests/fixtures/resolver_info/FunctionWithInfoValue.ts.expected.md
+++ b/src/tests/fixtures/resolver_info/FunctionWithInfoValue.ts.expected.md
@@ -28,7 +28,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greetz as queryGreetzResolver } from "./FunctionWithInfoValue";
+import { greetz as queryGreetzResolver } from "./FunctionWithInfoValue.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/resolver_info/StaticMethodWithInfoValue.ts.expected.md b/src/tests/fixtures/resolver_info/StaticMethodWithInfoValue.ts.expected.md
index 9b4504fc..ea24ccbe 100644
--- a/src/tests/fixtures/resolver_info/StaticMethodWithInfoValue.ts.expected.md
+++ b/src/tests/fixtures/resolver_info/StaticMethodWithInfoValue.ts.expected.md
@@ -38,7 +38,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { SomeType as queryGreetingResolver } from "./StaticMethodWithInfoValue";
+import { SomeType as queryGreetingResolver } from "./StaticMethodWithInfoValue.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/subscriptions/SubscriptionFunctionFieldWithAsyncIterable.ts.expected.md b/src/tests/fixtures/subscriptions/SubscriptionFunctionFieldWithAsyncIterable.ts.expected.md
index 87ada08b..b822845d 100644
--- a/src/tests/fixtures/subscriptions/SubscriptionFunctionFieldWithAsyncIterable.ts.expected.md
+++ b/src/tests/fixtures/subscriptions/SubscriptionFunctionFieldWithAsyncIterable.ts.expected.md
@@ -55,7 +55,7 @@ type Subscription {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLNonNull, GraphQLString } from "graphql";
-import { greetings as subscriptionGreetingsResolver, greetingsMaybe as subscriptionGreetingsMaybeResolver, maybeGreetings as subscriptionMaybeGreetingsResolver, maybeGreetingsMaybe as subscriptionMaybeGreetingsMaybeResolver } from "./SubscriptionFunctionFieldWithAsyncIterable";
+import { greetings as subscriptionGreetingsResolver, greetingsMaybe as subscriptionGreetingsMaybeResolver, maybeGreetings as subscriptionMaybeGreetingsResolver, maybeGreetingsMaybe as subscriptionMaybeGreetingsMaybeResolver } from "./SubscriptionFunctionFieldWithAsyncIterable.js";
 export function getSchema(): GraphQLSchema {
     const SubscriptionType: GraphQLObjectType = new GraphQLObjectType({
         name: "Subscription",
diff --git a/src/tests/fixtures/todo/userExample.ts.expected.md b/src/tests/fixtures/todo/userExample.ts.expected.md
index c221f8e3..77ce3aa5 100644
--- a/src/tests/fixtures/todo/userExample.ts.expected.md
+++ b/src/tests/fixtures/todo/userExample.ts.expected.md
@@ -45,7 +45,7 @@ type User {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { fullName as userFullNameResolver, me as someTypeMeResolver } from "./userExample";
+import { fullName as userFullNameResolver, me as someTypeMeResolver } from "./userExample.js";
 export function getSchema(): GraphQLSchema {
     const UserType: GraphQLObjectType = new GraphQLObjectType({
         name: "User",
diff --git a/src/tests/fixtures/top_level_fields/queryField.ts.expected.md b/src/tests/fixtures/top_level_fields/queryField.ts.expected.md
index 6d836fad..92a9a2d3 100644
--- a/src/tests/fixtures/top_level_fields/queryField.ts.expected.md
+++ b/src/tests/fixtures/top_level_fields/queryField.ts.expected.md
@@ -23,7 +23,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as queryGreetingResolver } from "./queryField";
+import { greeting as queryGreetingResolver } from "./queryField.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/top_level_fields/queryFieldOnStaticMethod.ts.expected.md b/src/tests/fixtures/top_level_fields/queryFieldOnStaticMethod.ts.expected.md
index 60c308a4..683d678f 100644
--- a/src/tests/fixtures/top_level_fields/queryFieldOnStaticMethod.ts.expected.md
+++ b/src/tests/fixtures/top_level_fields/queryFieldOnStaticMethod.ts.expected.md
@@ -25,7 +25,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { SomeNonGraphQLClass as queryGreetingResolver } from "./queryFieldOnStaticMethod";
+import { SomeNonGraphQLClass as queryGreetingResolver } from "./queryFieldOnStaticMethod.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/top_level_fields/queryFieldRenamed.ts.expected.md b/src/tests/fixtures/top_level_fields/queryFieldRenamed.ts.expected.md
index be99e939..ff0d140c 100644
--- a/src/tests/fixtures/top_level_fields/queryFieldRenamed.ts.expected.md
+++ b/src/tests/fixtures/top_level_fields/queryFieldRenamed.ts.expected.md
@@ -23,7 +23,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greetz as queryGreetingResolver } from "./queryFieldRenamed";
+import { greetz as queryGreetingResolver } from "./queryFieldRenamed.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/top_level_fields/queryFieldWithExplicitlyDefinedQuery.ts.expected.md b/src/tests/fixtures/top_level_fields/queryFieldWithExplicitlyDefinedQuery.ts.expected.md
index 66f8d8b6..338bb895 100644
--- a/src/tests/fixtures/top_level_fields/queryFieldWithExplicitlyDefinedQuery.ts.expected.md
+++ b/src/tests/fixtures/top_level_fields/queryFieldWithExplicitlyDefinedQuery.ts.expected.md
@@ -32,7 +32,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as queryGreetingResolver } from "./queryFieldWithExplicitlyDefinedQuery";
+import { greeting as queryGreetingResolver } from "./queryFieldWithExplicitlyDefinedQuery.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/top_level_fields/rootFields.ts.expected.md b/src/tests/fixtures/top_level_fields/rootFields.ts.expected.md
index ce806288..6142bec8 100644
--- a/src/tests/fixtures/top_level_fields/rootFields.ts.expected.md
+++ b/src/tests/fixtures/top_level_fields/rootFields.ts.expected.md
@@ -45,7 +45,7 @@ type Subscription {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString, GraphQLInt, GraphQLNonNull } from "graphql";
-import { greeting as queryGreetingResolver, deleteSomething as mutationDeleteSomethingResolver, range as subscriptionRangeResolver } from "./rootFields";
+import { greeting as queryGreetingResolver, deleteSomething as mutationDeleteSomethingResolver, range as subscriptionRangeResolver } from "./rootFields.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",
diff --git a/src/tests/fixtures/type_definitions_from_alias/AliasOfUnknownDefinesType.ts.expected.md b/src/tests/fixtures/type_definitions_from_alias/AliasOfUnknownDefinesType.ts.expected.md
index c8d848a3..41ecab7a 100644
--- a/src/tests/fixtures/type_definitions_from_alias/AliasOfUnknownDefinesType.ts.expected.md
+++ b/src/tests/fixtures/type_definitions_from_alias/AliasOfUnknownDefinesType.ts.expected.md
@@ -26,7 +26,7 @@ type SomeType {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { greeting as someTypeGreetingResolver } from "./AliasOfUnknownDefinesType";
+import { greeting as someTypeGreetingResolver } from "./AliasOfUnknownDefinesType.js";
 export function getSchema(): GraphQLSchema {
     const SomeTypeType: GraphQLObjectType = new GraphQLObjectType({
         name: "SomeType",
diff --git a/src/tests/fixtures/type_definitions_from_alias/QueryAsAliasOfUnknown.ts.expected.md b/src/tests/fixtures/type_definitions_from_alias/QueryAsAliasOfUnknown.ts.expected.md
index eb275203..cb13bd7a 100644
--- a/src/tests/fixtures/type_definitions_from_alias/QueryAsAliasOfUnknown.ts.expected.md
+++ b/src/tests/fixtures/type_definitions_from_alias/QueryAsAliasOfUnknown.ts.expected.md
@@ -26,7 +26,7 @@ type Query {
 
 ```ts
 import { GraphQLSchema, GraphQLObjectType, GraphQLString } from "graphql";
-import { foo as queryFooResolver } from "./QueryAsAliasOfUnknown";
+import { foo as queryFooResolver } from "./QueryAsAliasOfUnknown.js";
 export function getSchema(): GraphQLSchema {
     const QueryType: GraphQLObjectType = new GraphQLObjectType({
         name: "Query",