diff --git a/packages/core/test/test_bed_spec.ts b/packages/core/test/test_bed_spec.ts
index be238f17c9605..28c0a09053278 100644
--- a/packages/core/test/test_bed_spec.ts
+++ b/packages/core/test/test_bed_spec.ts
@@ -225,10 +225,31 @@ describe('TestBed', () => {
   });
 
   it('allow to override a provider', () => {
-    TestBed.overrideProvider(NAME, {useValue: 'injected World !'});
+    TestBed.overrideProvider(NAME, {useValue: 'injected World!'});
     const hello = TestBed.createComponent(HelloWorld);
     hello.detectChanges();
-    expect(hello.nativeElement).toHaveText('Hello injected World !');
+    expect(hello.nativeElement).toHaveText('Hello injected World!');
+  });
+
+  it('uses the most recent provider override', () => {
+    TestBed.overrideProvider(NAME, {useValue: 'injected World!'});
+    TestBed.overrideProvider(NAME, {useValue: 'injected World a second time!'});
+    const hello = TestBed.createComponent(HelloWorld);
+    hello.detectChanges();
+    expect(hello.nativeElement).toHaveText('Hello injected World a second time!');
+  });
+
+  it('overrides a providers in an array', () => {
+    TestBed.configureTestingModule({
+      imports: [HelloWorldModule],
+      providers: [
+        [{provide: NAME, useValue: 'injected World!'}],
+      ]
+    });
+    TestBed.overrideProvider(NAME, {useValue: 'injected World a second time!'});
+    const hello = TestBed.createComponent(HelloWorld);
+    hello.detectChanges();
+    expect(hello.nativeElement).toHaveText('Hello injected World a second time!');
   });
 
   describe('allow override of multi provider', () => {
diff --git a/packages/core/testing/src/r3_test_bed_compiler.ts b/packages/core/testing/src/r3_test_bed_compiler.ts
index 9c6a558564a25..7b4eaf506ed0c 100644
--- a/packages/core/testing/src/r3_test_bed_compiler.ts
+++ b/packages/core/testing/src/r3_test_bed_compiler.ts
@@ -621,8 +621,9 @@ export class R3TestBedCompiler {
   private getOverriddenProviders(providers?: Provider[]): Provider[] {
     if (!providers || !providers.length || this.providerOverridesByToken.size === 0) return [];
 
-    const overrides = this.getProviderOverrides(providers);
-    const overriddenProviders = [...providers, ...overrides];
+    const flattenedProviders = flatten<Provider[]>(providers);
+    const overrides = this.getProviderOverrides(flattenedProviders);
+    const overriddenProviders = [...flattenedProviders, ...overrides];
     const tokenToProviderMap: Map<any, Provider> = new Map();
 
     // Iterate through providers from the end so only the most recent provider is used for a given