diff --git a/vfs/tests/mptest/mptest_test.go b/vfs/tests/mptest/mptest_test.go
index c428aee..f2e6128 100644
--- a/vfs/tests/mptest/mptest_test.go
+++ b/vfs/tests/mptest/mptest_test.go
@@ -49,6 +49,9 @@ func TestMain(m *testing.M) {
 		panic(err)
 	}
 
+	if !strings.HasPrefix(compressed, "BZh") {
+		panic("Please use Git LFS to clone this repo: https://git-lfs.com/")
+	}
 	binary, err := io.ReadAll(bzip2.NewReader(strings.NewReader(compressed)))
 	if err != nil {
 		panic(err)
diff --git a/vfs/tests/speedtest1/speedtest1_test.go b/vfs/tests/speedtest1/speedtest1_test.go
index efecdaf..a0e59af 100644
--- a/vfs/tests/speedtest1/speedtest1_test.go
+++ b/vfs/tests/speedtest1/speedtest1_test.go
@@ -46,6 +46,9 @@ func TestMain(m *testing.M) {
 		panic(err)
 	}
 
+	if !strings.HasPrefix(compressed, "BZh") {
+		panic("Please use Git LFS to clone this repo: https://git-lfs.com/")
+	}
 	binary, err := io.ReadAll(bzip2.NewReader(strings.NewReader(compressed)))
 	if err != nil {
 		panic(err)