diff --git a/pkg/ddc/alluxio/utils_test.go b/pkg/ddc/alluxio/utils_test.go
index 6136bc2644e..671973347b8 100644
--- a/pkg/ddc/alluxio/utils_test.go
+++ b/pkg/ddc/alluxio/utils_test.go
@@ -921,6 +921,10 @@ func TestGetInitTierPathsEnv(t *testing.T) {
 	}
 }
 
+// TestGetMountRoot tests the function that retrieves the mount root directory.
+// It checks if the function correctly returns the expected mount root path based on the environment variable MOUNT_ROOT.
+// The test sets the MOUNT_ROOT environment variable to a specific path and verifies that the function returns the correct mount root path.revise twice.
+// The expected mount root path is constructed by appending "/alluxio" to the value of MOUNT_ROOT.
 func TestGetMountRoot(t *testing.T) {
 	tests := []struct {
 		name     string