diff --git a/libs/ng-mocks/src/lib/common/core.reflect.provided-in.spec.ts b/libs/ng-mocks/src/lib/common/core.reflect.provided-in.spec.ts
new file mode 100644
index 0000000000..7a63b24584
--- /dev/null
+++ b/libs/ng-mocks/src/lib/common/core.reflect.provided-in.spec.ts
@@ -0,0 +1,18 @@
+import coreReflectProvidedIn from './core.reflect.provided-in';
+
+describe('core.reflect.provided-in', () => {
+  it('covers ngInjectableDef', () => {
+    expect(
+      coreReflectProvidedIn({
+        ngInjectableDef: {},
+      }),
+    ).toEqual(undefined);
+    expect(
+      coreReflectProvidedIn({
+        ngInjectableDef: {
+          providedIn: 'root',
+        },
+      }),
+    ).toEqual('root');
+  });
+});
diff --git a/libs/ng-mocks/src/lib/common/core.reflect.provided-in.ts b/libs/ng-mocks/src/lib/common/core.reflect.provided-in.ts
new file mode 100644
index 0000000000..116cdb99e9
--- /dev/null
+++ b/libs/ng-mocks/src/lib/common/core.reflect.provided-in.ts
@@ -0,0 +1,5 @@
+import { AnyType } from './core.types';
+
+export default (declaration: any): undefined | AnyType<any> | string => {
+  return declaration?.ɵprov?.providedIn ?? declaration?.ngInjectableDef?.providedIn;
+};
diff --git a/libs/ng-mocks/src/lib/mock-builder/promise/get-root-provider-parameters.ts b/libs/ng-mocks/src/lib/mock-builder/promise/get-root-provider-parameters.ts
index 14d1e9ad12..f1ceeac54e 100644
--- a/libs/ng-mocks/src/lib/mock-builder/promise/get-root-provider-parameters.ts
+++ b/libs/ng-mocks/src/lib/mock-builder/promise/get-root-provider-parameters.ts
@@ -6,6 +6,7 @@ import addDefToRootProviderParameters from './add-def-to-root-provider-parameter
 import checkRootProviderDependency from './check-root-provider-dependency';
 import extractDep from './extract-dep';
 import getRootProvidersData from './get-root-providers-data';
+import handleProvidedInDependency from './handle-provided-in-dependency';
 import skipRootProviderDependency from './skip-root-provider-dependency';
 import { BuilderData } from './types';
 
@@ -19,6 +20,7 @@ export default (mockDef: BuilderData['mockDef']): Set<any> => {
 
       for (const decorators of coreReflectJit().parameters(def)) {
         const provide: any = extractDep(decorators);
+        handleProvidedInDependency(provide);
         if (skipRootProviderDependency(provide)) {
           continue;
         }
diff --git a/libs/ng-mocks/src/lib/mock-builder/promise/handle-provided-in-dependency.ts b/libs/ng-mocks/src/lib/mock-builder/promise/handle-provided-in-dependency.ts
new file mode 100644
index 0000000000..737bf07067
--- /dev/null
+++ b/libs/ng-mocks/src/lib/mock-builder/promise/handle-provided-in-dependency.ts
@@ -0,0 +1,17 @@
+import coreReflectProvidedIn from '../../common/core.reflect.provided-in';
+import ngMocksUniverse from '../../common/ng-mocks-universe';
+
+export default (provide: any): void => {
+  if (ngMocksUniverse.touches.has(provide)) {
+    return;
+  }
+
+  const providedIn = coreReflectProvidedIn(provide);
+  if (!providedIn) {
+    return;
+  }
+
+  if (ngMocksUniverse.config.get('ngMocksDepsSkip').has(providedIn)) {
+    ngMocksUniverse.config.get('ngMocksDepsSkip').add(provide);
+  }
+};
diff --git a/libs/ng-mocks/src/lib/mock-builder/promise/skip-dep.ts b/libs/ng-mocks/src/lib/mock-builder/promise/skip-dep.ts
index a84df2d337..3bf6f0697a 100644
--- a/libs/ng-mocks/src/lib/mock-builder/promise/skip-dep.ts
+++ b/libs/ng-mocks/src/lib/mock-builder/promise/skip-dep.ts
@@ -1,6 +1,7 @@
 import { DOCUMENT } from '@angular/common';
 
 import coreConfig from '../../common/core.config';
+import coreReflectProvidedIn from '../../common/core.reflect.provided-in';
 import { isNgInjectionToken } from '../../common/func.is-ng-injection-token';
 import ngMocksUniverse from '../../common/ng-mocks-universe';
 
@@ -25,9 +26,8 @@ export default (provide: any): boolean => {
   }
 
   // Empty providedIn or things for a platform have to be skipped.
-  let skip = !provide.ɵprov?.providedIn || provide.ɵprov.providedIn === 'platform';
-  // istanbul ignore next: A6
-  skip = skip && (!provide.ngInjectableDef?.providedIn || provide.ngInjectableDef.providedIn === 'platform');
+  const providedIn = coreReflectProvidedIn(provide);
+  const skip = !providedIn || providedIn === 'platform';
   if (typeof provide === 'function' && skip) {
     return true;
   }
diff --git a/tests/issue-377/e2e.spec.ts b/tests/issue-377/e2e.spec.ts
new file mode 100644
index 0000000000..4f902c79af
--- /dev/null
+++ b/tests/issue-377/e2e.spec.ts
@@ -0,0 +1,91 @@
+import {
+  Component,
+  Inject,
+  Injectable as InjectableSource,
+  InjectionToken,
+  NgModule,
+  VERSION,
+} from '@angular/core';
+import { TestBed } from '@angular/core/testing';
+import { MockBuilder, MockRender, ngMocks } from 'ng-mocks';
+
+// Because of A5 we need to cast Injectable to any type.
+// But because of A10+ we need to do it via a middle function.
+function Injectable(...args: any[]): any {
+  return InjectableSource(...args);
+}
+
+@NgModule({})
+class TargetModule {}
+
+@Injectable({
+  providedIn: TargetModule,
+} as any)
+class TargetService {
+  private readonly name = 'target';
+
+  public echo(): string {
+    return this.name;
+  }
+}
+
+// TODO Remove any with A5
+const TOKEN = new (InjectionToken as any)('TOKEN', {
+  factory: () => 'TOKEN',
+  providedIn: TargetModule,
+});
+
+@Component({
+  selector: 'target',
+  template: `service:{{ service.echo() }} token:{{ token }}`,
+})
+class TargetComponent {
+  public constructor(
+    public readonly service: TargetService,
+    @Inject(TOKEN) public readonly token: string,
+  ) {}
+}
+
+describe('issue-377', () => {
+  beforeEach(() => {
+    if (parseInt(VERSION.major, 10) <= 5) {
+      pending('Need Angular > 5');
+    }
+  });
+
+  describe('expected', () => {
+    beforeEach(() =>
+      TestBed.configureTestingModule({
+        declarations: [TargetComponent],
+        imports: [TargetModule],
+      }).compileComponents(),
+    );
+
+    it('sets TestBed correctly', () => {
+      const fixture = MockRender(TargetComponent);
+      expect(ngMocks.formatText(fixture)).toEqual(
+        'service:target token:TOKEN',
+      );
+    });
+  });
+
+  describe('keep', () => {
+    beforeEach(() => MockBuilder(TargetComponent).keep(TargetModule));
+
+    it('sets TestBed correctly', () => {
+      const fixture = MockRender(TargetComponent);
+      expect(ngMocks.formatText(fixture)).toEqual(
+        'service:target token:TOKEN',
+      );
+    });
+  });
+
+  describe('mock', () => {
+    beforeEach(() => MockBuilder(TargetComponent).mock(TargetModule));
+
+    it('sets TestBed correctly', () => {
+      const fixture = MockRender(TargetComponent);
+      expect(ngMocks.formatText(fixture)).toEqual('service: token:');
+    });
+  });
+});
diff --git a/tests/issue-377/test.spec.ts b/tests/issue-377/test.spec.ts
new file mode 100644
index 0000000000..7cf6c9a284
--- /dev/null
+++ b/tests/issue-377/test.spec.ts
@@ -0,0 +1,43 @@
+import { Component } from '@angular/core';
+import { TestBed } from '@angular/core/testing';
+import { FormBuilder, ReactiveFormsModule } from '@angular/forms';
+import { MockBuilder, MockRender } from 'ng-mocks';
+
+@Component({
+  selector: 'app-form',
+  template: `
+    <form [formGroup]="form">
+      <input type="text" formGroupName="name" />
+    </form>
+  `,
+})
+class FormComponent {
+  public form = this.fb.group({
+    name: [],
+  });
+
+  public constructor(private readonly fb: FormBuilder) {}
+}
+
+describe('issue-377:classic', () => {
+  beforeEach(() =>
+    TestBed.configureTestingModule({
+      declarations: [FormComponent],
+      imports: [ReactiveFormsModule],
+    }).compileComponents(),
+  );
+
+  it('sets TestBed correctly', () => {
+    expect(() => MockRender(FormComponent)).not.toThrow();
+  });
+});
+
+describe('issue-377:mock', () => {
+  beforeEach(() =>
+    MockBuilder(FormComponent).keep(ReactiveFormsModule),
+  );
+
+  it('sets TestBed correctly', () => {
+    expect(() => MockRender(FormComponent)).not.toThrow();
+  });
+});