diff --git a/modules/store/spec/types/action_creator.spec.ts b/modules/store/spec/types/action_creator.spec.ts
index 873777693c..4155d6f62e 100644
--- a/modules/store/spec/types/action_creator.spec.ts
+++ b/modules/store/spec/types/action_creator.spec.ts
@@ -39,7 +39,7 @@ describe('createAction()', () => {
       expectSnippet(`
         const foo = createAction('FOO', props<{ type: number }>());
       `).toFail(
-        /Argument of type '"type property is not allowed in action creators"' is not assignable to parameter of type/
+        / Type 'Props<\{ type: number; \}>' is not assignable to type '"type property is not allowed in action creators"'/
       );
     });
 
@@ -47,7 +47,7 @@ describe('createAction()', () => {
       expectSnippet(`
         const foo = createAction('FOO', props<[]>());
       `).toFail(
-        /Argument of type '"arrays are not allowed in action creators"' is not assignable to parameter of type/
+        /Type 'Props<\[\]>' is not assignable to type '"arrays are not allowed in action creators"'/
       );
     });
   });
@@ -80,7 +80,7 @@ describe('createAction()', () => {
       expectSnippet(`
         const foo = createAction('FOO', (type: string) => ({type}));
       `).toFail(
-        /Type '{ type: string; }' is not assignable to type '"type property is not allowed in action creators"'/
+        /Type '\(type: string\) => \{ type: string; \}' is not assignable to type '"type property is not allowed in action creators"'/
       );
     });
 
@@ -88,7 +88,7 @@ describe('createAction()', () => {
       expectSnippet(`
         const foo = createAction('FOO', () => [ ]);
       `).toFail(
-        /Type 'any\[]' is not assignable to type '"arrays are not allowed in action creators"'/
+        /Type '\(\) => any\[\]' is not assignable to type '"arrays are not allowed in action creators"'/
       );
     });
   });
diff --git a/modules/store/spec/types/utils.ts b/modules/store/spec/types/utils.ts
index 019d47df49..24f2eada6a 100644
--- a/modules/store/spec/types/utils.ts
+++ b/modules/store/spec/types/utils.ts
@@ -2,6 +2,7 @@ export const compilerOptions = () => ({
   moduleResolution: 'node',
   target: 'es2015',
   baseUrl: '.',
+  experimentalDecorators: true,
   paths: {
     '@ngrx/store': ['./modules/store'],
   },
diff --git a/modules/store/src/action_creator.ts b/modules/store/src/action_creator.ts
index 492fbedf8d..341bb5b79b 100644
--- a/modules/store/src/action_creator.ts
+++ b/modules/store/src/action_creator.ts
@@ -15,7 +15,7 @@ export function createAction<T extends string>(
 ): ActionCreator<T, () => TypedAction<T>>;
 export function createAction<T extends string, P extends object>(
   type: T,
-  config: Props<P>
+  config: Props<P> & NotAllowedCheck<P>
 ): ActionCreator<T, (props: P & NotAllowedCheck<P>) => P & TypedAction<T>>;
 export function createAction<
   T extends string,