diff --git a/java/classpath_fragment.go b/java/classpath_fragment.go
index bc0416a..0e14d24 100644
--- a/java/classpath_fragment.go
+++ b/java/classpath_fragment.go
@@ -105,7 +105,7 @@
 }
 
 func (c *ClasspathFragmentBase) generateClasspathProtoBuildActions(ctx android.ModuleContext, jars []classpathJar) {
-	outputFilename := ctx.ModuleName() + ".pb"
+	outputFilename := strings.ToLower(c.classpathType.String()) + ".pb"
 	c.outputFilepath = android.PathForModuleOut(ctx, outputFilename).OutputPath
 	c.installDirPath = android.PathForModuleInstall(ctx, "etc", "classpaths")
 
diff --git a/java/platform_bootclasspath_test.go b/java/platform_bootclasspath_test.go
index efcbc80..9fffa0a 100644
--- a/java/platform_bootclasspath_test.go
+++ b/java/platform_bootclasspath_test.go
@@ -287,7 +287,7 @@
 	).RunTest(t)
 
 	p := result.Module("platform-bootclasspath", "android_common").(*platformBootclasspathModule)
-	android.AssertStringEquals(t, "output filepath", p.Name()+".pb", p.ClasspathFragmentBase.outputFilepath.Base())
+	android.AssertStringEquals(t, "output filepath", "bootclasspath.pb", p.ClasspathFragmentBase.outputFilepath.Base())
 	android.AssertPathRelativeToTopEquals(t, "install filepath", "out/soong/target/product/test_device/system/etc/classpaths", p.ClasspathFragmentBase.installDirPath)
 }
 
@@ -327,7 +327,7 @@
 		want := map[string][]string{
 			"LOCAL_MODULE":                {"platform-bootclasspath"},
 			"LOCAL_MODULE_CLASS":          {"ETC"},
-			"LOCAL_INSTALLED_MODULE_STEM": {"platform-bootclasspath.pb"},
+			"LOCAL_INSTALLED_MODULE_STEM": {"bootclasspath.pb"},
 			// Output and Install paths are tested separately in TestPlatformBootclasspath_ClasspathFragmentPaths
 		}
 
diff --git a/java/systemserver_classpath_fragment_test.go b/java/systemserver_classpath_fragment_test.go
index 5272f27..9ad50dd 100644
--- a/java/systemserver_classpath_fragment_test.go
+++ b/java/systemserver_classpath_fragment_test.go
@@ -24,7 +24,7 @@
 	PrepareForTestWithJavaDefaultModules,
 )
 
-func TestPlatformSystemserverClasspathVariant(t *testing.T) {
+func TestPlatformSystemServerClasspathVariant(t *testing.T) {
 	result := android.GroupFixturePreparers(
 		prepareForTestWithSystemServerClasspath,
 		android.FixtureWithRootAndroidBp(`
@@ -38,7 +38,7 @@
 	android.AssertIntEquals(t, "expect 1 variant", 1, len(variants))
 }
 
-func TestPlatformSystemserverClasspath_ClasspathFragmentPaths(t *testing.T) {
+func TestPlatformSystemServerClasspath_ClasspathFragmentPaths(t *testing.T) {
 	result := android.GroupFixturePreparers(
 		prepareForTestWithSystemServerClasspath,
 		android.FixtureWithRootAndroidBp(`
@@ -49,11 +49,11 @@
 	).RunTest(t)
 
 	p := result.Module("platform-systemserverclasspath", "android_common").(*platformSystemServerClasspathModule)
-	android.AssertStringEquals(t, "output filepath", p.Name()+".pb", p.ClasspathFragmentBase.outputFilepath.Base())
+	android.AssertStringEquals(t, "output filepath", "systemserverclasspath.pb", p.ClasspathFragmentBase.outputFilepath.Base())
 	android.AssertPathRelativeToTopEquals(t, "install filepath", "out/soong/target/product/test_device/system/etc/classpaths", p.ClasspathFragmentBase.installDirPath)
 }
 
-func TestPlatformSystemserverClasspathModule_AndroidMkEntries(t *testing.T) {
+func TestPlatformSystemServerClasspathModule_AndroidMkEntries(t *testing.T) {
 	preparer := android.GroupFixturePreparers(
 		prepareForTestWithSystemServerClasspath,
 		android.FixtureWithRootAndroidBp(`
@@ -78,8 +78,8 @@
 		want := map[string][]string{
 			"LOCAL_MODULE":                {"platform-systemserverclasspath"},
 			"LOCAL_MODULE_CLASS":          {"ETC"},
-			"LOCAL_INSTALLED_MODULE_STEM": {"platform-systemserverclasspath.pb"},
-			// Output and Install paths are tested separately in TestSystemserverClasspath_ClasspathFragmentPaths
+			"LOCAL_INSTALLED_MODULE_STEM": {"systemserverclasspath.pb"},
+			// Output and Install paths are tested separately in TestPlatformSystemServerClasspath_ClasspathFragmentPaths
 		}
 
 		p := result.Module("platform-systemserverclasspath", "android_common").(*platformSystemServerClasspathModule)
@@ -96,7 +96,7 @@
 	})
 }
 
-func TestSystemserverclasspathFragmentWithoutContents(t *testing.T) {
+func TestSystemServerClasspathFragmentWithoutContents(t *testing.T) {
 	prepareForTestWithSystemServerClasspath.
 		ExtendWithErrorHandler(android.FixtureExpectsAtLeastOneErrorMatchingPattern(
 			`\Qempty contents are not allowed\E`)).