diff --git a/packages/@aws-cdk/integ-runner/lib/runner/integration-tests.ts b/packages/@aws-cdk/integ-runner/lib/runner/integration-tests.ts
index 970dc1c4fd6f3..8da9d3ebaa47b 100644
--- a/packages/@aws-cdk/integ-runner/lib/runner/integration-tests.ts
+++ b/packages/@aws-cdk/integ-runner/lib/runner/integration-tests.ts
@@ -321,7 +321,11 @@ export class IntegrationTests {
           fileName,
           appCommand,
         })),
-      );
+      )
+      // Remove tests with duplicate names, giving precedence in lexicographic order
+      // Which ensures precedence of compiled .js files over their .ts source
+      .sort((a, b) => a.testName.localeCompare(b.testName))
+      .filter((a, idx, allTests) => allTests.findIndex(b => (b.testName === a.testName)) === idx);
 
     return this.filterTests(discoveredTests, options.tests, options.exclude);
   }
diff --git a/packages/@aws-cdk/integ-runner/test/runner/integration-tests.test.ts b/packages/@aws-cdk/integ-runner/test/runner/integration-tests.test.ts
index 0057986775416..11c5af79756e5 100644
--- a/packages/@aws-cdk/integ-runner/test/runner/integration-tests.test.ts
+++ b/packages/@aws-cdk/integ-runner/test/runner/integration-tests.test.ts
@@ -114,4 +114,19 @@ describe('IntegrationTests Discovery', () => {
       });
     });
   });
+
+  describe('Same test file in JS and TS is only running JS', () => {
+    const cliOptions = {
+      language: ['javascript', 'typescript'],
+    };
+
+    test('find only JS files', async () => {
+      const integTests = await tests.fromCliOptions(cliOptions);
+
+      expect(integTests.length).toEqual(3);
+      expect(integTests[0].fileName).toEqual(expect.stringMatching(new RegExp('^.*test1\\.js$')));
+      expect(integTests[1].fileName).toEqual(expect.stringMatching(new RegExp('^.*test2\\.js$')));
+      expect(integTests[2].fileName).toEqual(expect.stringMatching(new RegExp('^.*test3\\.js$')));
+    });
+  });
 });