diff --git a/packages/aws-cdk-lib/aws-stepfunctions/test/state-machine-resources.test.ts b/packages/aws-cdk-lib/aws-stepfunctions/test/state-machine-resources.test.ts
index 3ca0a4638b524..62b088ebe048e 100644
--- a/packages/aws-cdk-lib/aws-stepfunctions/test/state-machine-resources.test.ts
+++ b/packages/aws-cdk-lib/aws-stepfunctions/test/state-machine-resources.test.ts
@@ -162,6 +162,7 @@ describe('State Machine Resources', () => {
     'States.ArrayLength($.inputArray)',
     'States.JsonMerge($.json1, $.json2, false)',
     'States.StringToJson($.escapedJsonString)',
+    'plainString',
   ])('fails in synthesis if specifying invalid intrinsic functions in the causePath and errorPath (%s)', (intrinsic) => {
     // GIVEN
     const app = new cdk.App();