diff --git a/packages/compiler-cli/src/ngcc/src/host/fesm2015_host.ts b/packages/compiler-cli/src/ngcc/src/host/fesm2015_host.ts
index e69b22f5d3..4d46794232 100644
--- a/packages/compiler-cli/src/ngcc/src/host/fesm2015_host.ts
+++ b/packages/compiler-cli/src/ngcc/src/host/fesm2015_host.ts
@@ -336,7 +336,7 @@ export class Fesm2015ReflectionHost extends TypeScriptReflectionHost implements
           decoratorsIdentifier.parent.operatorToken.kind === ts.SyntaxKind.EqualsToken) {
         // AST of the array of decorator values
         const decoratorsArray = decoratorsIdentifier.parent.right;
-        return this.reflectDecorators(decoratorsArray);
+        return this.reflectDecorators(decoratorsArray).filter(isImportedFromCore);
       }
     }
     return null;
@@ -404,8 +404,12 @@ export class Fesm2015ReflectionHost extends TypeScriptReflectionHost implements
     const propDecoratorsMap = getPropertyValueFromSymbol(decoratorsProperty);
     if (propDecoratorsMap && ts.isObjectLiteralExpression(propDecoratorsMap)) {
       const propertiesMap = reflectObjectLiteral(propDecoratorsMap);
-      propertiesMap.forEach(
-          (value, name) => { memberDecorators.set(name, this.reflectDecorators(value)); });
+      propertiesMap.forEach((value, name) => {
+        const decorators = this.reflectDecorators(value).filter(isImportedFromCore);
+        if (decorators.length) {
+          memberDecorators.set(name, decorators);
+        }
+      });
     }
     return memberDecorators;
   }
@@ -727,7 +731,8 @@ export class Fesm2015ReflectionHost extends TypeScriptReflectionHost implements
             .map(paramInfo => {
               const type = paramInfo && paramInfo.get('type') || null;
               const decoratorInfo = paramInfo && paramInfo.get('decorators') || null;
-              const decorators = decoratorInfo && this.reflectDecorators(decoratorInfo);
+              const decorators =
+                  decoratorInfo && this.reflectDecorators(decoratorInfo).filter(isImportedFromCore);
               return {type, decorators};
             });
       }
diff --git a/packages/compiler-cli/src/ngcc/test/host/esm5_host_spec.ts b/packages/compiler-cli/src/ngcc/test/host/esm5_host_spec.ts
index 25fe54083e..ea3f641d9e 100644
--- a/packages/compiler-cli/src/ngcc/test/host/esm5_host_spec.ts
+++ b/packages/compiler-cli/src/ngcc/test/host/esm5_host_spec.ts
@@ -79,46 +79,42 @@ const FOO_FUNCTION_FILE = {
 const INVALID_DECORATORS_FILE = {
   name: '/invalid_decorators.js',
   contents: `
-    var NotArrayLiteralDecorator = {};
+    import { Directive } from '@angular/core';
     var NotArrayLiteral = (function() {
       function NotArrayLiteral() {
       }
       NotArrayLiteral.decorators = () => [
-        { type: NotArrayLiteralDecorator, args: [{ selector: '[ignored]' },] },
+        { type: Directive, args: [{ selector: '[ignored]' },] },
       ];
       return NotArrayLiteral;
     }());
 
-    var NotObjectLiteralDecorator = {};
     var NotObjectLiteral = (function() {
       function NotObjectLiteral() {
       }
       NotObjectLiteral.decorators = [
         "This is not an object literal",
-        { type: NotObjectLiteralDecorator },
+        { type: Directive },
       ];
       return NotObjectLiteral;
     }());
 
-    var NoTypePropertyDecorator1 = {};
-    var NoTypePropertyDecorator2 = {};
     var NoTypeProperty = (function() {
       function NoTypeProperty() {
       }
       NoTypeProperty.decorators = [
-        { notType: NoTypePropertyDecorator1 },
-        { type: NoTypePropertyDecorator2 },
+        { notType: Directive },
+        { type: Directive },
       ];
       return NoTypeProperty;
     }());
 
-    var NotIdentifierDecorator = {};
     var NotIdentifier = (function() {
       function NotIdentifier() {
       }
       NotIdentifier.decorators = [
         { type: 'StringsLiteralsAreNotIdentifiers' },
-        { type: NotIdentifierDecorator },
+        { type: Directive },
       ];
       return NotIdentifier;
     }());
@@ -128,33 +124,31 @@ const INVALID_DECORATORS_FILE = {
 const INVALID_DECORATOR_ARGS_FILE = {
   name: '/invalid_decorator_args.js',
   contents: `
-    var NoArgsPropertyDecorator = {};
+    import { Directive } from '@angular/core';
     var NoArgsProperty = (function() {
       function NoArgsProperty() {
       }
       NoArgsProperty.decorators = [
-        { type: NoArgsPropertyDecorator },
+        { type: Directive },
       ];
       return NoArgsProperty;
     }());
 
-    var NoPropertyAssignmentDecorator = {};
     var args = [{ selector: '[ignored]' },];
     var NoPropertyAssignment = (function() {
       function NoPropertyAssignment() {
       }
       NoPropertyAssignment.decorators = [
-        { type: NoPropertyAssignmentDecorator, args },
+        { type: Directive, args },
       ];
       return NoPropertyAssignment;
     }());
 
-    var NotArrayLiteralDecorator = {};
     var NotArrayLiteral = (function() {
       function NotArrayLiteral() {
       }
       NotArrayLiteral.decorators = [
-        { type: NotArrayLiteralDecorator, args: () => [{ selector: '[ignored]' },] },
+        { type: Directive, args: () => [{ selector: '[ignored]' },] },
       ];
       return NotArrayLiteral;
     }());
@@ -164,51 +158,47 @@ const INVALID_DECORATOR_ARGS_FILE = {
 const INVALID_PROP_DECORATORS_FILE = {
   name: '/invalid_prop_decorators.js',
   contents: `
-    var NotObjectLiteralDecorator = {};
+    import { Input } from '@angular/core';
     var NotObjectLiteral = (function() {
       function NotObjectLiteral() {
       }
       NotObjectLiteral.propDecorators = () => ({
-        "prop": [{ type: NotObjectLiteralDecorator },]
+        "prop": [{ type: Input },]
       });
       return NotObjectLiteral;
     }());
 
-    var NotObjectLiteralPropDecorator = {};
     var NotObjectLiteralProp = (function() {
       function NotObjectLiteralProp() {
       }
       NotObjectLiteralProp.propDecorators = {
         "prop": [
           "This is not an object literal",
-          { type: NotObjectLiteralPropDecorator },
+          { type: Input },
         ]
       };
       return NotObjectLiteralProp;
     }());
 
-    var NoTypePropertyDecorator1 = {};
-    var NoTypePropertyDecorator2 = {};
     var NoTypeProperty = (function() {
       function NoTypeProperty() {
       }
       NoTypeProperty.propDecorators = {
         "prop": [
-          { notType: NoTypePropertyDecorator1 },
-          { type: NoTypePropertyDecorator2 },
+          { notType: Input },
+          { type: Input },
         ]
       };
       return NoTypeProperty;
     }());
 
-    var NotIdentifierDecorator = {};
     var NotIdentifier = (function() {
       function NotIdentifier() {
       }
       NotIdentifier.propDecorators = {
         "prop": [
           { type: 'StringsLiteralsAreNotIdentifiers' },
-          { type: NotIdentifierDecorator },
+          { type: Input },
         ]
       };
       return NotIdentifier;
@@ -219,33 +209,31 @@ const INVALID_PROP_DECORATORS_FILE = {
 const INVALID_PROP_DECORATOR_ARGS_FILE = {
   name: '/invalid_prop_decorator_args.js',
   contents: `
-    var NoArgsPropertyDecorator = {};
+    import { Input } from '@angular/core';
     var NoArgsProperty = (function() {
       function NoArgsProperty() {
       }
       NoArgsProperty.propDecorators = {
-        "prop": [{ type: NoArgsPropertyDecorator },]
+        "prop": [{ type: Input },]
       };
       return NoArgsProperty;
     }());
 
-    var NoPropertyAssignmentDecorator = {};
     var args = [{ selector: '[ignored]' },];
     var NoPropertyAssignment = (function() {
       function NoPropertyAssignment() {
       }
       NoPropertyAssignment.propDecorators = {
-        "prop": [{ type: NoPropertyAssignmentDecorator, args },]
+        "prop": [{ type: Input, args },]
       };
       return NoPropertyAssignment;
     }());
 
-    var NotArrayLiteralDecorator = {};
     var NotArrayLiteral = (function() {
       function NotArrayLiteral() {
       }
       NotArrayLiteral.propDecorators = {
-        "prop": [{ type: NotArrayLiteralDecorator, args: () => [{ selector: '[ignored]' },] },],
+        "prop": [{ type: Input, args: () => [{ selector: '[ignored]' },] },],
       };
       return NotArrayLiteral;
     }());
@@ -255,23 +243,22 @@ const INVALID_PROP_DECORATOR_ARGS_FILE = {
 const INVALID_CTOR_DECORATORS_FILE = {
   name: '/invalid_ctor_decorators.js',
   contents: `
+    import { Inject } from '@angular/core';
     var NoParametersDecorator = {};
     var NoParameters = (function() {
       function NoParameters() {}
       return NoParameters;
     }());
 
-    var ArrowFunctionDecorator = {};
     var ArrowFunction = (function() {
       function ArrowFunction(arg1) {
       }
       ArrowFunction.ctorParameters = () => [
-        { type: 'ParamType', decorators: [{ type: ArrowFunctionDecorator },] }
+        { type: 'ParamType', decorators: [{ type: Inject },] }
       ];
       return ArrowFunction;
     }());
 
-    var NotArrayLiteralDecorator = {};
     var NotArrayLiteral = (function() {
       function NotArrayLiteral(arg1) {
       }
@@ -279,19 +266,16 @@ const INVALID_CTOR_DECORATORS_FILE = {
       return NotArrayLiteral;
     }());
 
-    var NotObjectLiteralDecorator = {};
     var NotObjectLiteral = (function() {
       function NotObjectLiteral(arg1, arg2) {
       }
       NotObjectLiteral.ctorParameters = function() { return [
         "This is not an object literal",
-        { type: 'ParamType', decorators: [{ type: NotObjectLiteralDecorator },] },
+        { type: 'ParamType', decorators: [{ type: Inject },] },
       ]; };
       return NotObjectLiteral;
     }());
 
-    var NoTypePropertyDecorator1 = {};
-    var NoTypePropertyDecorator2 = {};
     var NoTypeProperty = (function() {
       function NoTypeProperty(arg1, arg2) {
       }
@@ -299,15 +283,14 @@ const INVALID_CTOR_DECORATORS_FILE = {
         {
           type: 'ParamType',
           decorators: [
-            { notType: NoTypePropertyDecorator1 },
-            { type: NoTypePropertyDecorator2 },
+            { notType: Inject },
+            { type: Inject },
           ]
         },
       ]; };
       return NoTypeProperty;
     }());
 
-    var NotIdentifierDecorator = {};
     var NotIdentifier = (function() {
       function NotIdentifier(arg1, arg2) {
       }
@@ -316,7 +299,7 @@ const INVALID_CTOR_DECORATORS_FILE = {
           type: 'ParamType',
           decorators: [
             { type: 'StringsLiteralsAreNotIdentifiers' },
-            { type: NotIdentifierDecorator },
+            { type: Inject },
           ]
         },
       ]; };
@@ -328,33 +311,31 @@ const INVALID_CTOR_DECORATORS_FILE = {
 const INVALID_CTOR_DECORATOR_ARGS_FILE = {
   name: '/invalid_ctor_decorator_args.js',
   contents: `
-    var NoArgsPropertyDecorator = {};
+    import { Inject } from '@angular/core';
     var NoArgsProperty = (function() {
       function NoArgsProperty(arg1) {
       }
       NoArgsProperty.ctorParameters = function() { return [
-        { type: 'ParamType', decorators: [{ type: NoArgsPropertyDecorator },] },
+        { type: 'ParamType', decorators: [{ type: Inject },] },
       ]; };
       return NoArgsProperty;
     }());
 
-    var NoPropertyAssignmentDecorator = {};
     var args = [{ selector: '[ignored]' },];
     var NoPropertyAssignment = (function() {
       function NoPropertyAssignment(arg1) {
       }
       NoPropertyAssignment.ctorParameters = function() { return [
-        { type: 'ParamType', decorators: [{ type: NoPropertyAssignmentDecorator, args },] },
+        { type: 'ParamType', decorators: [{ type: Inject, args },] },
       ]; };
       return NoPropertyAssignment;
     }());
 
-    var NotArrayLiteralDecorator = {};
     var NotArrayLiteral = (function() {
       function NotArrayLiteral(arg1) {
       }
       NotArrayLiteral.ctorParameters = function() { return [
-        { type: 'ParamType', decorators: [{ type: NotArrayLiteralDecorator, args: () => [{ selector: '[ignored]' },] },] },
+        { type: 'ParamType', decorators: [{ type: Inject, args: () => [{ selector: '[ignored]' },] },] },
       ]; };
       return NotArrayLiteral;
     }());
@@ -502,7 +483,7 @@ describe('Esm5ReflectionHost', () => {
       const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotObjectLiteralDecorator'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
     });
 
     it('should ignore decorator elements that have no `type` property', () => {
@@ -513,7 +494,7 @@ describe('Esm5ReflectionHost', () => {
       const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NoTypePropertyDecorator2'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
     });
 
     it('should ignore decorator elements whose `type` value is not an identifier', () => {
@@ -524,11 +505,11 @@ describe('Esm5ReflectionHost', () => {
       const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotIdentifierDecorator'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
     });
 
     it('should use `getImportOfIdentifier()` to retrieve import info', () => {
-      const mockImportInfo = {} as Import;
+      const mockImportInfo = { name: 'mock', from: '@angular/core' } as Import;
       const spy = spyOn(Esm5ReflectionHost.prototype, 'getImportOfIdentifier')
                       .and.returnValue(mockImportInfo);
 
@@ -554,7 +535,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoArgsPropertyDecorator');
+        expect(decorators[0].name).toBe('Directive');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -567,7 +548,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoPropertyAssignmentDecorator');
+        expect(decorators[0].name).toBe('Directive');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -579,7 +560,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NotArrayLiteralDecorator');
+        expect(decorators[0].name).toBe('Directive');
         expect(decorators[0].args).toEqual([]);
       });
     });
@@ -688,9 +669,7 @@ describe('Esm5ReflectionHost', () => {
       const decorators = prop.decorators !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({
-        name: 'NotObjectLiteralPropDecorator'
-      }));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Input'}));
     });
 
     it('should ignore prop decorator elements that have no `type` property', () => {
@@ -703,7 +682,7 @@ describe('Esm5ReflectionHost', () => {
       const decorators = prop.decorators !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NoTypePropertyDecorator2'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Input'}));
     });
 
     it('should ignore prop decorator elements whose `type` value is not an identifier', () => {
@@ -716,14 +695,14 @@ describe('Esm5ReflectionHost', () => {
       const decorators = prop.decorators !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotIdentifierDecorator'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Input'}));
     });
 
     it('should use `getImportOfIdentifier()` to retrieve import info', () => {
       let callCount = 0;
       const spy = spyOn(Esm5ReflectionHost.prototype, 'getImportOfIdentifier').and.callFake(() => {
         callCount++;
-        return {name: `name${callCount}`, from: `from${callCount}`};
+        return {name: `name${callCount}`, from: `@angular/core`};
       });
 
       const program = makeProgram(SOME_DIRECTIVE_FILE);
@@ -737,7 +716,7 @@ describe('Esm5ReflectionHost', () => {
 
       const index = members.findIndex(member => member.name === 'input1');
       expect(members[index].decorators !.length).toBe(1);
-      expect(members[index].decorators ![0].import).toEqual({name: 'name1', from: 'from1'});
+      expect(members[index].decorators ![0].import).toEqual({name: 'name1', from: '@angular/core'});
     });
 
     describe('(returned prop decorators `args`)', () => {
@@ -752,7 +731,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = prop.decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoArgsPropertyDecorator');
+        expect(decorators[0].name).toBe('Input');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -767,7 +746,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = prop.decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoPropertyAssignmentDecorator');
+        expect(decorators[0].name).toBe('Input');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -782,7 +761,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = prop.decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NotArrayLiteralDecorator');
+        expect(decorators[0].name).toBe('Input');
         expect(decorators[0].args).toEqual([]);
       });
     });
@@ -887,7 +866,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NoTypePropertyDecorator2'}));
+        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Inject'}));
       });
 
       it('should ignore param decorator elements whose `type` value is not an identifier', () => {
@@ -899,11 +878,11 @@ describe('Esm5ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotIdentifierDecorator'}));
+        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Inject'}));
       });
 
       it('should use `getImportOfIdentifier()` to retrieve import info', () => {
-        const mockImportInfo = {} as Import;
+        const mockImportInfo = { name: 'mock', from: '@angulare/core' } as Import;
         const spy = spyOn(Esm5ReflectionHost.prototype, 'getImportOfIdentifier')
                         .and.returnValue(mockImportInfo);
 
@@ -934,7 +913,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoArgsPropertyDecorator');
+        expect(decorators[0].name).toBe('Inject');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -948,7 +927,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoPropertyAssignmentDecorator');
+        expect(decorators[0].name).toBe('Inject');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -962,7 +941,7 @@ describe('Esm5ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NotArrayLiteralDecorator');
+        expect(decorators[0].name).toBe('Inject');
         expect(decorators[0].args).toEqual([]);
       });
     });
diff --git a/packages/compiler-cli/src/ngcc/test/host/fesm2015_host_spec.ts b/packages/compiler-cli/src/ngcc/test/host/fesm2015_host_spec.ts
index 0d8d6373ad..4f3e55492e 100644
--- a/packages/compiler-cli/src/ngcc/test/host/fesm2015_host_spec.ts
+++ b/packages/compiler-cli/src/ngcc/test/host/fesm2015_host_spec.ts
@@ -76,36 +76,32 @@ const FOO_FUNCTION_FILE = {
 const INVALID_DECORATORS_FILE = {
   name: '/invalid_decorators.js',
   contents: `
-    const NotArrayLiteralDecorator = {};
+    import {Directive} from '@angular/core';
     class NotArrayLiteral {
     }
     NotArrayLiteral.decorators = () => [
-      { type: NotArrayLiteralDecorator, args: [{ selector: '[ignored]' },] },
+      { type: Directive, args: [{ selector: '[ignored]' },] },
     ];
 
-    const NotObjectLiteralDecorator = {};
     class NotObjectLiteral {
     }
     NotObjectLiteral.decorators = [
       "This is not an object literal",
-      { type: NotObjectLiteralDecorator },
+      { type: Directive },
     ];
 
-    const NoTypePropertyDecorator1 = {};
-    const NoTypePropertyDecorator2 = {};
     class NoTypeProperty {
     }
     NoTypeProperty.decorators = [
-      { notType: NoTypePropertyDecorator1 },
-      { type: NoTypePropertyDecorator2 },
+      { notType: Directive },
+      { type: Directive },
     ];
 
-    const NotIdentifierDecorator = {};
     class NotIdentifier {
     }
     NotIdentifier.decorators = [
       { type: 'StringsLiteralsAreNotIdentifiers' },
-      { type: NotIdentifierDecorator },
+      { type: Directive },
     ];
   `,
 };
@@ -113,26 +109,24 @@ const INVALID_DECORATORS_FILE = {
 const INVALID_DECORATOR_ARGS_FILE = {
   name: '/invalid_decorator_args.js',
   contents: `
-    const NoArgsPropertyDecorator = {};
+    import {Directive} from '@angular/core';
     class NoArgsProperty {
     }
     NoArgsProperty.decorators = [
-      { type: NoArgsPropertyDecorator },
+      { type: Directive },
     ];
 
-    const NoPropertyAssignmentDecorator = {};
     const args = [{ selector: '[ignored]' },];
     class NoPropertyAssignment {
     }
     NoPropertyAssignment.decorators = [
-      { type: NoPropertyAssignmentDecorator, args },
+      { type: Directive, args },
     ];
 
-    const NotArrayLiteralDecorator = {};
     class NotArrayLiteral {
     }
     NotArrayLiteral.decorators = [
-      { type: NotArrayLiteralDecorator, args: () => [{ selector: '[ignored]' },] },
+      { type: Directive, args: () => [{ selector: '[ignored]' },] },
     ];
   `,
 };
@@ -140,41 +134,37 @@ const INVALID_DECORATOR_ARGS_FILE = {
 const INVALID_PROP_DECORATORS_FILE = {
   name: '/invalid_prop_decorators.js',
   contents: `
-    const NotObjectLiteralDecorator = {};
+    import {Input} from '@angular/core';
     class NotObjectLiteral {
     }
     NotObjectLiteral.propDecorators = () => ({
-      "prop": [{ type: NotObjectLiteralDecorator },]
+      "prop": [{ type: Input },]
     });
 
-    const NotObjectLiteralPropDecorator = {};
     class NotObjectLiteralProp {
     }
     NotObjectLiteralProp.propDecorators = {
       "prop": [
         "This is not an object literal",
-        { type: NotObjectLiteralPropDecorator },
+        { type: Input },
       ]
     };
 
-    const NoTypePropertyDecorator1 = {};
-    const NoTypePropertyDecorator2 = {};
     class NoTypeProperty {
     }
     NoTypeProperty.propDecorators = {
       "prop": [
-        { notType: NoTypePropertyDecorator1 },
-        { type: NoTypePropertyDecorator2 },
+        { notType: Input },
+        { type: Input },
       ]
     };
 
-    const NotIdentifierDecorator = {};
     class NotIdentifier {
     }
     NotIdentifier.propDecorators = {
       "prop": [
         { type: 'StringsLiteralsAreNotIdentifiers' },
-        { type: NotIdentifierDecorator },
+        { type: Input },
       ]
     };
   `,
@@ -183,26 +173,24 @@ const INVALID_PROP_DECORATORS_FILE = {
 const INVALID_PROP_DECORATOR_ARGS_FILE = {
   name: '/invalid_prop_decorator_args.js',
   contents: `
-    const NoArgsPropertyDecorator = {};
+    import {Input} from '@angular/core';
     class NoArgsProperty {
     }
     NoArgsProperty.propDecorators = {
-      "prop": [{ type: NoArgsPropertyDecorator },]
+      "prop": [{ type: Input },]
     };
 
-    const NoPropertyAssignmentDecorator = {};
     const args = [{ selector: '[ignored]' },];
     class NoPropertyAssignment {
     }
     NoPropertyAssignment.propDecorators = {
-      "prop": [{ type: NoPropertyAssignmentDecorator, args },]
+      "prop": [{ type: Input, args },]
     };
 
-    const NotArrayLiteralDecorator = {};
     class NotArrayLiteral {
     }
     NotArrayLiteral.propDecorators = {
-      "prop": [{ type: NotArrayLiteralDecorator, args: () => [{ selector: '[ignored]' },] },],
+      "prop": [{ type: Input, args: () => [{ selector: '[ignored]' },] },],
     };
   `,
 };
@@ -210,40 +198,44 @@ const INVALID_PROP_DECORATOR_ARGS_FILE = {
 const INVALID_CTOR_DECORATORS_FILE = {
   name: '/invalid_ctor_decorators.js',
   contents: `
-    const NoParametersDecorator = {};
+    import {Inject} from '@angular/core';
     class NoParameters {
       constructor() {
       }
     }
 
-    const NotArrowFunctionDecorator = {};
+    const NotFromCoreDecorator = {};
+    class NotFromCore {
+      constructor(arg1) {
+      }
+    }
+    NotFromCore.ctorParameters = () => [
+      { type: 'ParamType', decorators: [{ type: NotFromCoreDecorator },] },
+    ]
+
     class NotArrowFunction {
       constructor(arg1) {
       }
     }
     NotArrowFunction.ctorParameters = function() {
-      return { type: 'ParamType', decorators: [{ type: NotArrowFunctionDecorator },] };
+      return { type: 'ParamType', decorators: [{ type: Inject },] };
     };
 
-    const NotArrayLiteralDecorator = {};
     class NotArrayLiteral {
       constructor(arg1) {
       }
     }
     NotArrayLiteral.ctorParameters = () => 'StringsAreNotArrayLiterals';
 
-    const NotObjectLiteralDecorator = {};
     class NotObjectLiteral {
       constructor(arg1, arg2) {
       }
     }
     NotObjectLiteral.ctorParameters = () => [
       "This is not an object literal",
-      { type: 'ParamType', decorators: [{ type: NotObjectLiteralDecorator },] },
+      { type: 'ParamType', decorators: [{ type: Inject },] },
     ];
 
-    const NoTypePropertyDecorator1 = {};
-    const NoTypePropertyDecorator2 = {};
     class NoTypeProperty {
       constructor(arg1, arg2) {
       }
@@ -252,13 +244,12 @@ const INVALID_CTOR_DECORATORS_FILE = {
       {
         type: 'ParamType',
         decorators: [
-          { notType: NoTypePropertyDecorator1 },
-          { type: NoTypePropertyDecorator2 },
+          { notType: Inject },
+          { type: Inject },
         ]
       },
     ];
 
-    const NotIdentifierDecorator = {};
     class NotIdentifier {
       constructor(arg1, arg2) {
       }
@@ -268,7 +259,7 @@ const INVALID_CTOR_DECORATORS_FILE = {
         type: 'ParamType',
         decorators: [
           { type: 'StringsLiteralsAreNotIdentifiers' },
-          { type: NotIdentifierDecorator },
+          { type: Inject },
         ]
       },
     ];
@@ -278,32 +269,30 @@ const INVALID_CTOR_DECORATORS_FILE = {
 const INVALID_CTOR_DECORATOR_ARGS_FILE = {
   name: '/invalid_ctor_decorator_args.js',
   contents: `
-    const NoArgsPropertyDecorator = {};
+    import {Inject} from '@angular/core';
     class NoArgsProperty {
       constructor(arg1) {
       }
     }
     NoArgsProperty.ctorParameters = () => [
-      { type: 'ParamType', decorators: [{ type: NoArgsPropertyDecorator },] },
+      { type: 'ParamType', decorators: [{ type: Inject },] },
     ];
 
-    const NoPropertyAssignmentDecorator = {};
     const args = [{ selector: '[ignored]' },];
     class NoPropertyAssignment {
       constructor(arg1) {
       }
     }
     NoPropertyAssignment.ctorParameters = () => [
-      { type: 'ParamType', decorators: [{ type: NoPropertyAssignmentDecorator, args },] },
+      { type: 'ParamType', decorators: [{ type: Inject, args },] },
     ];
 
-    const NotArrayLiteralDecorator = {};
     class NotArrayLiteral {
       constructor(arg1) {
       }
     }
     NotArrayLiteral.ctorParameters = () => [
-      { type: 'ParamType', decorators: [{ type: NotArrayLiteralDecorator, args: () => [{ selector: '[ignored]' },] },] },
+      { type: 'ParamType', decorators: [{ type: Inject, args: () => [{ selector: '[ignored]' },] },] },
     ];
   `,
 };
@@ -459,7 +448,7 @@ describe('Fesm2015ReflectionHost', () => {
       const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotObjectLiteralDecorator'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
     });
 
     it('should ignore decorator elements that have no `type` property', () => {
@@ -470,7 +459,7 @@ describe('Fesm2015ReflectionHost', () => {
       const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NoTypePropertyDecorator2'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
     });
 
     it('should ignore decorator elements whose `type` value is not an identifier', () => {
@@ -481,11 +470,11 @@ describe('Fesm2015ReflectionHost', () => {
       const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotIdentifierDecorator'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
     });
 
     it('should use `getImportOfIdentifier()` to retrieve import info', () => {
-      const mockImportInfo = {} as Import;
+      const mockImportInfo = { from: '@angular/core' } as Import;
       const spy = spyOn(Fesm2015ReflectionHost.prototype, 'getImportOfIdentifier')
                       .and.returnValue(mockImportInfo);
 
@@ -511,7 +500,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoArgsPropertyDecorator');
+        expect(decorators[0].name).toBe('Directive');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -524,7 +513,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoPropertyAssignmentDecorator');
+        expect(decorators[0].name).toBe('Directive');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -536,7 +525,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = host.getDecoratorsOfDeclaration(classNode) !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NotArrayLiteralDecorator');
+        expect(decorators[0].name).toBe('Directive');
         expect(decorators[0].args).toEqual([]);
       });
     });
@@ -644,9 +633,7 @@ describe('Fesm2015ReflectionHost', () => {
       const decorators = prop.decorators !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({
-        name: 'NotObjectLiteralPropDecorator'
-      }));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Input'}));
     });
 
     it('should ignore prop decorator elements that have no `type` property', () => {
@@ -659,7 +646,7 @@ describe('Fesm2015ReflectionHost', () => {
       const decorators = prop.decorators !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NoTypePropertyDecorator2'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Input'}));
     });
 
     it('should ignore prop decorator elements whose `type` value is not an identifier', () => {
@@ -672,7 +659,7 @@ describe('Fesm2015ReflectionHost', () => {
       const decorators = prop.decorators !;
 
       expect(decorators.length).toBe(1);
-      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotIdentifierDecorator'}));
+      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Input'}));
     });
 
     it('should use `getImportOfIdentifier()` to retrieve import info', () => {
@@ -680,7 +667,7 @@ describe('Fesm2015ReflectionHost', () => {
       const spy =
           spyOn(Fesm2015ReflectionHost.prototype, 'getImportOfIdentifier').and.callFake(() => {
             callCount++;
-            return {name: `name${callCount}`, from: `from${callCount}`};
+            return {name: `name${callCount}`, from: '@angular/core'};
           });
 
       const program = makeProgram(SOME_DIRECTIVE_FILE);
@@ -698,9 +685,9 @@ describe('Fesm2015ReflectionHost', () => {
         'HostListener',
       ]);
 
-      const index = members.findIndex(member => member.name === 'input1');
-      expect(members[index].decorators !.length).toBe(1);
-      expect(members[index].decorators ![0].import).toEqual({name: 'name1', from: 'from1'});
+      const member = members.find(member => member.name === 'input1') !;
+      expect(member.decorators !.length).toBe(1);
+      expect(member.decorators ![0].import).toEqual({name: 'name1', from: '@angular/core'});
     });
 
     describe('(returned prop decorators `args`)', () => {
@@ -715,7 +702,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = prop.decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoArgsPropertyDecorator');
+        expect(decorators[0].name).toBe('Input');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -730,7 +717,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = prop.decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoPropertyAssignmentDecorator');
+        expect(decorators[0].name).toBe('Input');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -745,7 +732,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = prop.decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NotArrayLiteralDecorator');
+        expect(decorators[0].name).toBe('Input');
         expect(decorators[0].args).toEqual([]);
       });
     });
@@ -757,13 +744,13 @@ describe('Fesm2015ReflectionHost', () => {
       const host = new Fesm2015ReflectionHost(program.getTypeChecker());
       const classNode =
           getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
-      const parameters = host.getConstructorParameters(classNode);
+      const parameters = host.getConstructorParameters(classNode) !;
 
       expect(parameters).toBeDefined();
-      expect(parameters !.map(parameter => parameter.name)).toEqual([
+      expect(parameters.map(parameter => parameter.name)).toEqual([
         '_viewContainer', '_template', 'injected'
       ]);
-      expect(parameters !.map(parameter => parameter.type !.getText())).toEqual([
+      expect(parameters.map(parameter => parameter.type !.getText())).toEqual([
         'ViewContainerRef', 'TemplateRef', 'undefined'
       ]);
     });
@@ -792,12 +779,12 @@ describe('Fesm2015ReflectionHost', () => {
       const host = new Fesm2015ReflectionHost(program.getTypeChecker());
       const classNode = getDeclaration(
           program, SIMPLE_CLASS_FILE.name, 'NoDecoratorConstructorClass', ts.isClassDeclaration);
-      const parameters = host.getConstructorParameters(classNode);
+      const parameters = host.getConstructorParameters(classNode) !;
 
       expect(parameters).toEqual(jasmine.any(Array));
-      expect(parameters !.length).toEqual(1);
-      expect(parameters ![0].name).toEqual('foo');
-      expect(parameters ![0].decorators).toBe(null);
+      expect(parameters.length).toEqual(1);
+      expect(parameters[0].name).toEqual('foo');
+      expect(parameters[0].decorators).toBe(null);
     });
 
     it('should return an empty array if there are no constructor parameters', () => {
@@ -810,15 +797,29 @@ describe('Fesm2015ReflectionHost', () => {
       expect(parameters).toEqual([]);
     });
 
+    it('should ignore decorators that are not imported from core', () => {
+      const program = makeProgram(INVALID_CTOR_DECORATORS_FILE);
+      const host = new Fesm2015ReflectionHost(program.getTypeChecker());
+      const classNode = getDeclaration(
+          program, INVALID_CTOR_DECORATORS_FILE.name, 'NotFromCore', ts.isClassDeclaration);
+      const parameters = host.getConstructorParameters(classNode) !;
+
+      expect(parameters.length).toBe(1);
+      expect(parameters[0]).toEqual(jasmine.objectContaining({
+        name: 'arg1',
+        decorators: [],
+      }));
+    });
+
     it('should ignore `ctorParameters` if it is not an arrow function', () => {
       const program = makeProgram(INVALID_CTOR_DECORATORS_FILE);
       const host = new Fesm2015ReflectionHost(program.getTypeChecker());
       const classNode = getDeclaration(
           program, INVALID_CTOR_DECORATORS_FILE.name, 'NotArrowFunction', ts.isClassDeclaration);
-      const parameters = host.getConstructorParameters(classNode);
+      const parameters = host.getConstructorParameters(classNode) !;
 
-      expect(parameters !.length).toBe(1);
-      expect(parameters ![0]).toEqual(jasmine.objectContaining({
+      expect(parameters.length).toBe(1);
+      expect(parameters[0]).toEqual(jasmine.objectContaining({
         name: 'arg1',
         decorators: null,
       }));
@@ -829,10 +830,10 @@ describe('Fesm2015ReflectionHost', () => {
       const host = new Fesm2015ReflectionHost(program.getTypeChecker());
       const classNode = getDeclaration(
           program, INVALID_CTOR_DECORATORS_FILE.name, 'NotArrayLiteral', ts.isClassDeclaration);
-      const parameters = host.getConstructorParameters(classNode);
+      const parameters = host.getConstructorParameters(classNode) !;
 
-      expect(parameters !.length).toBe(1);
-      expect(parameters ![0]).toEqual(jasmine.objectContaining({
+      expect(parameters.length).toBe(1);
+      expect(parameters[0]).toEqual(jasmine.objectContaining({
         name: 'arg1',
         decorators: null,
       }));
@@ -866,7 +867,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NoTypePropertyDecorator2'}));
+        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Inject'}));
       });
 
       it('should ignore param decorator elements whose `type` value is not an identifier', () => {
@@ -878,11 +879,11 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotIdentifierDecorator'}));
+        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Inject'}));
       });
 
       it('should use `getImportOfIdentifier()` to retrieve import info', () => {
-        const mockImportInfo = {} as Import;
+        const mockImportInfo: Import = {name: 'mock', from: '@angular/core'};
         const spy = spyOn(Fesm2015ReflectionHost.prototype, 'getImportOfIdentifier')
                         .and.returnValue(mockImportInfo);
 
@@ -890,8 +891,8 @@ describe('Fesm2015ReflectionHost', () => {
         const host = new Fesm2015ReflectionHost(program.getTypeChecker());
         const classNode = getDeclaration(
             program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
-        const parameters = host.getConstructorParameters(classNode);
-        const decorators = parameters ![2].decorators !;
+        const parameters = host.getConstructorParameters(classNode) !;
+        const decorators = parameters[2].decorators !;
 
         expect(decorators.length).toEqual(1);
         expect(decorators[0].import).toBe(mockImportInfo);
@@ -913,7 +914,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoArgsPropertyDecorator');
+        expect(decorators[0].name).toBe('Inject');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -927,7 +928,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NoPropertyAssignmentDecorator');
+        expect(decorators[0].name).toBe('Inject');
         expect(decorators[0].args).toEqual([]);
       });
 
@@ -941,7 +942,7 @@ describe('Fesm2015ReflectionHost', () => {
         const decorators = parameters ![0].decorators !;
 
         expect(decorators.length).toBe(1);
-        expect(decorators[0].name).toBe('NotArrayLiteralDecorator');
+        expect(decorators[0].name).toBe('Inject');
         expect(decorators[0].args).toEqual([]);
       });
     });
diff --git a/packages/compiler-cli/src/ngcc/test/parsing/esm5_parser_spec.ts b/packages/compiler-cli/src/ngcc/test/parsing/esm5_parser_spec.ts
index f69ce36a78..1fad910ea3 100644
--- a/packages/compiler-cli/src/ngcc/test/parsing/esm5_parser_spec.ts
+++ b/packages/compiler-cli/src/ngcc/test/parsing/esm5_parser_spec.ts
@@ -15,6 +15,7 @@ import {makeProgram} from '../helpers/utils';
 const BASIC_FILE = {
   name: '/primary.js',
   contents: `
+  import {Directive} from '@angular/core';
   var A = (function() {
     function A() {}
     A.decorators = [
diff --git a/packages/compiler-cli/src/ngcc/test/rendering/esm2015_renderer_spec.ts b/packages/compiler-cli/src/ngcc/test/rendering/esm2015_renderer_spec.ts
index b66c4eaae3..32c1366de7 100644
--- a/packages/compiler-cli/src/ngcc/test/rendering/esm2015_renderer_spec.ts
+++ b/packages/compiler-cli/src/ngcc/test/rendering/esm2015_renderer_spec.ts
@@ -200,7 +200,7 @@ A.decorators = [
            const analyzedFile = analyze(parser, analyzer, program.getSourceFile(PROGRAM.name) !);
            const output = new MagicString(PROGRAM.contents);
            const analyzedClass = analyzedFile.analyzedClasses[1];
-           const decorator = analyzedClass.decorators[1];
+           const decorator = analyzedClass.decorators[0];
            const decoratorsToRemove = new Map<ts.Node, ts.Node[]>();
            decoratorsToRemove.set(decorator.node.parent !, [decorator.node]);
            renderer.removeDecorators(output, decoratorsToRemove);
diff --git a/packages/compiler-cli/src/ngcc/test/rendering/esm5_renderer_spec.ts b/packages/compiler-cli/src/ngcc/test/rendering/esm5_renderer_spec.ts
index bbc5841149..79097895ce 100644
--- a/packages/compiler-cli/src/ngcc/test/rendering/esm5_renderer_spec.ts
+++ b/packages/compiler-cli/src/ngcc/test/rendering/esm5_renderer_spec.ts
@@ -223,7 +223,7 @@ SOME DEFINITION TEXT
          const analyzedFile = analyze(parser, analyzer, program.getSourceFile(PROGRAM.name) !);
          const output = new MagicString(PROGRAM.contents);
          const analyzedClass = analyzedFile.analyzedClasses[1];
-         const decorator = analyzedClass.decorators[1];
+         const decorator = analyzedClass.decorators[0];
          const decoratorsToRemove = new Map<ts.Node, ts.Node[]>();
          decoratorsToRemove.set(decorator.node.parent !, [decorator.node]);
          renderer.removeDecorators(output, decoratorsToRemove);