diff --git a/java/app.go b/java/app.go
index c08aefd..08b2d91 100644
--- a/java/app.go
+++ b/java/app.go
@@ -392,7 +392,7 @@
 func (a *AndroidApp) getCertString(ctx android.BaseContext) string {
 	certificate, overridden := ctx.DeviceConfig().OverrideCertificateFor(ctx.ModuleName())
 	if overridden {
-		return ":" + certificate
+		return certificate
 	}
 	return String(a.appProperties.Certificate)
 }
diff --git a/java/app_test.go b/java/app_test.go
index 317c752..313844f 100644
--- a/java/app_test.go
+++ b/java/app_test.go
@@ -747,3 +747,57 @@
 		})
 	}
 }
+
+func TestOverrideModule(t *testing.T) {
+	ctx := testJava(t, `
+		android_app {
+			name: "foo",
+			srcs: ["a.java"],
+		}
+
+		override_module {
+			name: "bar",
+			base: "foo",
+			certificate: ":new_certificate",
+			manifest_package_name: "org.dandroid.bp",
+		}
+
+		android_app_certificate {
+			name: "new_certificate",
+	    certificate: "cert/new_cert",
+		}
+		`)
+
+	// The base module still contains all the final outputs after overrides.
+	foo := ctx.ModuleForTests("foo", "android_common")
+
+	// Check the final apk name
+	outputs := foo.AllOutputs()
+	e := buildDir + "/target/product/test_device/system/app/bar/bar.apk"
+	found := false
+	for _, o := range outputs {
+		if o == e {
+			found = true
+			break
+		}
+	}
+	if !found {
+		t.Errorf("Can't find %q in output files.\nAll outputs:%v", e, outputs)
+	}
+
+	// Check the certificate paths
+	signapk := foo.Output("foo.apk")
+	signFlags := signapk.Args["certificates"]
+	e = "cert/new_cert.x509.pem cert/new_cert.pk8"
+	if e != signFlags {
+		t.Errorf("Incorrect signing flags, expected: %q, got: %q", e, signFlags)
+	}
+
+	// Check the manifest package name
+	res := foo.Output("package-res.apk")
+	aapt2Flags := res.Args["flags"]
+	e = "--rename-manifest-package org.dandroid.bp"
+	if !strings.Contains(aapt2Flags, e) {
+		t.Errorf("package renaming flag, %q is missing in aapt2 link flags, %q", e, aapt2Flags)
+	}
+}
diff --git a/java/java_test.go b/java/java_test.go
index 8d3efcb..bbcc9ed 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -81,11 +81,13 @@
 	ctx.RegisterModuleType("droiddoc_host", android.ModuleFactoryAdaptor(DroiddocHostFactory))
 	ctx.RegisterModuleType("droiddoc_template", android.ModuleFactoryAdaptor(ExportedDroiddocDirFactory))
 	ctx.RegisterModuleType("java_sdk_library", android.ModuleFactoryAdaptor(SdkLibraryFactory))
+	ctx.RegisterModuleType("override_module", android.ModuleFactoryAdaptor(android.OverrideModuleFactory))
 	ctx.RegisterModuleType("prebuilt_apis", android.ModuleFactoryAdaptor(PrebuiltApisFactory))
 	ctx.PreArchMutators(android.RegisterPrebuiltsPreArchMutators)
 	ctx.PreArchMutators(android.RegisterPrebuiltsPostDepsMutators)
 	ctx.PreArchMutators(android.RegisterDefaultsPreArchMutators)
 	ctx.PreArchMutators(func(ctx android.RegisterMutatorsContext) {
+		ctx.TopDown("load_hooks", android.LoadHookMutator).Parallel()
 		ctx.TopDown("prebuilt_apis", PrebuiltApisMutator).Parallel()
 		ctx.TopDown("java_sdk_library", SdkLibraryMutator).Parallel()
 	})