diff --git a/core/src/main/scala/chisel3/experimental/hierarchy/core/Instance.scala b/core/src/main/scala/chisel3/experimental/hierarchy/core/Instance.scala
index 9cf6f402961..0c819554de7 100644
--- a/core/src/main/scala/chisel3/experimental/hierarchy/core/Instance.scala
+++ b/core/src/main/scala/chisel3/experimental/hierarchy/core/Instance.scala
@@ -67,15 +67,8 @@ final case class Instance[+A] private[chisel3] (private[chisel3] val underlying:
   }
 
   /** Returns the definition of this Instance */
-  override def toDefinition: Definition[A] = {
-    val result = new Definition(Proto(proto))
-    // Because we are creating a new Definition, we should update our Builder.definitions
-    if (Builder.inContext && !Builder.definitions.view.map(_.proto).contains(result.proto)) {
-      Builder.definitions += result
-    }
-    result
-  }
-  override def toInstance: Instance[A] = this
+  override def toDefinition: Definition[A] = new Definition(Proto(proto))
+  override def toInstance:   Instance[A] = this
   private[chisel3] def copy[T](underlying: Underlying[T]) = new Instance(underlying)
 
 }
diff --git a/src/test/scala-2/chiselTests/experimental/hierarchy/DefinitionSpec.scala b/src/test/scala-2/chiselTests/experimental/hierarchy/DefinitionSpec.scala
index fec7e2db6a3..06d6fa55b06 100644
--- a/src/test/scala-2/chiselTests/experimental/hierarchy/DefinitionSpec.scala
+++ b/src/test/scala-2/chiselTests/experimental/hierarchy/DefinitionSpec.scala
@@ -945,59 +945,4 @@ class DefinitionSpec extends AnyFunSpec with Matchers with FileCheck {
         )
     }
   }
-  describe("(9): Calling .toDefinition should update Builder.definitions") {
-    it("(9.a): calling .toDefinition from another definition's child Instance should work as expected") {
-      class Bar extends RawModule {
-        val a = WireInit(false.B)
-      }
-      @instantiable
-      class Foo extends RawModule {
-        @public val bar = Module(new Bar)
-      }
-      class Baz(d: Definition[Foo]) extends RawModule {
-        val bar = Instance(d.bar.toDefinition)
-      }
-      ChiselStage
-        .emitCHIRRTL(
-          {
-            val d = Definition(new Foo)
-            new Baz(d)
-          },
-          Array("--full-stacktrace")
-        )
-        .fileCheck()(
-          """|CHECK: module Bar :
-             |CHECK: module Baz :
-             |""".stripMargin
-        )
-    }
-    it("(9.b): calling .toDefinition twice from anther definition's child Instance should work as expected") {
-      class Bar extends RawModule {
-        val a = WireInit(false.B)
-      }
-      @instantiable
-      class Foo extends RawModule {
-        @public val bar = Module(new Bar)
-      }
-      class Baz(d: Definition[Foo]) extends RawModule {
-        val bar = Instance(d.bar.toDefinition)
-        val bar2 = Instance(d.bar.toDefinition)
-      }
-      val x = ChiselStage
-        .emitCHIRRTL(
-          {
-            val d = Definition(new Foo)
-            new Baz(d)
-          },
-          Array("--full-stacktrace")
-        )
-        .fileCheck()(
-          """|CHECK: module Bar :
-             |CHECK-NOT: module Bar_
-             |CHECK: module Baz :
-             |""".stripMargin
-        )
-    }
-  }
-
 }