diff --git a/actions-workflow-parser/src/model/converter/job/inputs.ts b/actions-workflow-parser/src/model/converter/job/inputs.ts
index 6b5d366..92a6b88 100644
--- a/actions-workflow-parser/src/model/converter/job/inputs.ts
+++ b/actions-workflow-parser/src/model/converter/job/inputs.ts
@@ -32,7 +32,7 @@ export function convertWorkflowJobInputs(context: TemplateContext, job: Reusable
 
   if (inputValues !== undefined) {
     for (const [_, [name, value]] of inputValues) {
-      if (inputDefinitions !== undefined && !inputDefinitions.has(name.toLowerCase())) {
+      if (inputDefinitions === undefined || !inputDefinitions.has(name.toLowerCase())) {
         context.error(value, `Invalid input, ${name} is not defined in the referenced workflow.`);
       }
     }
diff --git a/actions-workflow-parser/testdata/reader/errors-reusable-workflow-job-inputs-undefined.yml b/actions-workflow-parser/testdata/reader/errors-reusable-workflow-job-inputs-undefined.yml
index 7611a4c..87c5b82 100644
--- a/actions-workflow-parser/testdata/reader/errors-reusable-workflow-job-inputs-undefined.yml
+++ b/actions-workflow-parser/testdata/reader/errors-reusable-workflow-job-inputs-undefined.yml
@@ -1,7 +1,6 @@
 include-source: false # Drop file/line/col from output
 skip:
   - Go
-  - TypeScript
 ---
 on: push
 jobs: