diff --git a/packages/core/src/render3/jit/module.ts b/packages/core/src/render3/jit/module.ts
index 1ac60246d3..b6f2e47588 100644
--- a/packages/core/src/render3/jit/module.ts
+++ b/packages/core/src/render3/jit/module.ts
@@ -171,7 +171,7 @@ function verifySemanticsOfNgModuleDef(
     ngModuleDef = getNgModuleDef(moduleType) !;
     if (!ngModuleDef) {
       throw new Error(
-          `Unexpected value '${moduleType.name}' imported by the module '${importingModule.name}'. Please add a @NgModule annotation.`);
+          `Unexpected value '${moduleType.name}' imported by the module '${importingModule.name}'. Please add an @NgModule annotation.`);
     }
   } else {
     ngModuleDef = getNgModuleDef(moduleType, true);
@@ -186,7 +186,7 @@ function verifySemanticsOfNgModuleDef(
   const exports = maybeUnwrapFn(ngModuleDef.exports);
   declarations.forEach(verifyDeclarationsHaveDefinitions);
   const combinedDeclarations: Type<any>[] = [
-    ...declarations.map(resolveForwardRef),  //
+    ...declarations.map(resolveForwardRef),
     ...flatten(imports.map(computeCombinedExports)).map(resolveForwardRef),
   ];
   exports.forEach(verifyExportsAreDeclaredOrReExported);
@@ -283,12 +283,12 @@ function verifySemanticsOfNgModuleDef(
 
     if (getComponentDef(type) || getDirectiveDef(type)) {
       throw new Error(
-          `Unexpected directive '${type.name}' imported by the module '${importingModule.name}'. Please add a @NgModule annotation.`);
+          `Unexpected directive '${type.name}' imported by the module '${importingModule.name}'. Please add an @NgModule annotation.`);
     }
 
     if (getPipeDef(type)) {
       throw new Error(
-          `Unexpected pipe '${type.name}' imported by the module '${importingModule.name}'. Please add a @NgModule annotation.`);
+          `Unexpected pipe '${type.name}' imported by the module '${importingModule.name}'. Please add an @NgModule annotation.`);
     }
   }
 }
diff --git a/packages/core/test/acceptance/integration_spec.ts b/packages/core/test/acceptance/integration_spec.ts
index af675d3f38..b4986714db 100644
--- a/packages/core/test/acceptance/integration_spec.ts
+++ b/packages/core/test/acceptance/integration_spec.ts
@@ -1428,7 +1428,8 @@ describe('acceptance integration tests', () => {
             .createComponent(SomeComponent);
       })
           .toThrowError(
-              `Unexpected directive 'SomeComponent' imported by the module 'ModuleWithImportedComponent'. Please add a @NgModule annotation.`);
+              // The ViewEngine error has a typo, whereas the Ivy one fixes it.
+              /^Unexpected directive 'SomeComponent' imported by the module 'ModuleWithImportedComponent'\. Please add (a|an) @NgModule annotation\.$/);
     });
 
     it('should throw with descriptive error message when a pipe is passed to imports', () => {
@@ -1446,7 +1447,8 @@ describe('acceptance integration tests', () => {
             .createComponent(FixtureComponent);
       })
           .toThrowError(
-              `Unexpected pipe 'SomePipe' imported by the module 'ModuleWithImportedPipe'. Please add a @NgModule annotation.`);
+              // The ViewEngine error has a typo, whereas the Ivy one fixes it.
+              /^Unexpected pipe 'SomePipe' imported by the module 'ModuleWithImportedPipe'\. Please add (a|an) @NgModule annotation\.$/);
     });
 
     it('should throw with descriptive error message when a module is passed to declarations', () => {
@@ -1501,7 +1503,8 @@ describe('acceptance integration tests', () => {
                .createComponent(FixtureComponent);
          })
              .toThrowError(
-                 `Unexpected value 'SomeModule' imported by the module 'ModuleWithImportedModule'. Please add a @NgModule annotation.`);
+                 // The ViewEngine error has a typo, whereas the Ivy one fixes it.
+                 /^Unexpected value 'SomeModule' imported by the module 'ModuleWithImportedModule'\. Please add (a|an) @NgModule annotation\.$/);
        });
 
   });