diff --git a/packages/scratch-vm/src/util/cast.js b/packages/scratch-vm/src/util/cast.js
index af624a30fa0..8857fc5eda4 100644
--- a/packages/scratch-vm/src/util/cast.js
+++ b/packages/scratch-vm/src/util/cast.js
@@ -167,7 +167,12 @@ class Cast {
             return true;
         } else if (typeof val === 'string') {
             // If it contains a decimal point, don't consider it an int.
-            return val.indexOf('.') < 0;
+            if (val.toLowerCase().split('e').length === 2) {
+                return Number(val) === parseInt(Number(val), 10);
+            } else {
+                // If it contains a decimal point, don't consider it an int.
+                return val.indexOf('.') < 0;
+            }
         }
         return false;
     }
diff --git a/packages/scratch-vm/test/unit/util_cast.js b/packages/scratch-vm/test/unit/util_cast.js
index d3ca0c308dd..99f3a5e0a02 100644
--- a/packages/scratch-vm/test/unit/util_cast.js
+++ b/packages/scratch-vm/test/unit/util_cast.js
@@ -151,7 +151,7 @@ test('isInt', t => {
     t.equal(cast.isInt('0'), true);
     t.equal(cast.isInt('1'), true);
     t.equal(cast.isInt('0.0'), false);
-    t.equal(cast.isInt('0.1e10'), false);
+    t.equal(cast.isInt('0.1e10'), true);
     t.equal(cast.isInt('3.14'), false);
 
     // Boolean