diff --git a/packages/schematics/angular/migrations/update-9/ivy-libraries.ts b/packages/schematics/angular/migrations/update-9/ivy-libraries.ts
index a88f19946cf5..5d9fe6a0a560 100644
--- a/packages/schematics/angular/migrations/update-9/ivy-libraries.ts
+++ b/packages/schematics/angular/migrations/update-9/ivy-libraries.ts
@@ -114,5 +114,7 @@ function createTsConfig(tree: Tree, tsConfigPath: string) {
     },
   };
 
-  tree.create(tsConfigPath, JSON.stringify(tsConfigContent, undefined, 2));
+  if (!tree.exists(tsConfigPath)) {
+    tree.create(tsConfigPath, JSON.stringify(tsConfigContent, undefined, 2));
+  }
 }
diff --git a/packages/schematics/angular/migrations/update-9/ivy-libraries_spec.ts b/packages/schematics/angular/migrations/update-9/ivy-libraries_spec.ts
index ecb42748b501..bd7ba0d0aea1 100644
--- a/packages/schematics/angular/migrations/update-9/ivy-libraries_spec.ts
+++ b/packages/schematics/angular/migrations/update-9/ivy-libraries_spec.ts
@@ -59,6 +59,8 @@ describe('Migration to version 9', () => {
           tree,
         )
         .toPromise();
+
+      tree.delete(libProdTsConfig);
     });
 
     it(`should add 'tsConfig' option in production when configurations doesn't exists`, async () => {