diff --git a/filesystem/filesystem_test.go b/filesystem/filesystem_test.go
index 5c780f8..9b26cf6 100644
--- a/filesystem/filesystem_test.go
+++ b/filesystem/filesystem_test.go
@@ -367,7 +367,7 @@
 
 func TestSystemImageDefaults(t *testing.T) {
 	result := fixture.RunTestWithBp(t, `
-		android_system_image_defaults {
+		android_filesystem_defaults {
 			name: "defaults",
 			multilib: {
 				common: {
@@ -433,3 +433,25 @@
 		android.AssertStringListContains(t, "missing entry", fs.entries, e)
 	}
 }
+
+func TestInconsistentPartitionTypesInDefaults(t *testing.T) {
+	fixture.ExtendWithErrorHandler(android.FixtureExpectsOneErrorPattern(
+		"doesn't match with the partition type")).
+		RunTestWithBp(t, `
+		android_filesystem_defaults {
+			name: "system_ext_def",
+			partition_type: "system_ext",
+		}
+
+		android_filesystem_defaults {
+			name: "system_def",
+			partition_type: "system",
+			defaults: ["system_ext_def"],
+		}
+
+		android_system_image {
+			name: "system",
+			defaults: ["system_def"],
+		}
+	`)
+}