diff --git a/tests/test_common.c b/tests/test_common.c
index dae485f..0a76ccd 100644
--- a/tests/test_common.c
+++ b/tests/test_common.c
@@ -22,12 +22,12 @@
 	    const char *preamble, const char *desc, const char *comment)
 {
   if (result == expected) {
-    fprintf(stderr, "%s: %s, %s ... " COL_GREEN "PASSED\n" COL_STOP,
-	    preamble, desc, comment);
+    fprintf(stderr, "%s: %s ... " COL_GREEN "PASSED\n" COL_STOP,
+	    preamble, comment ? comment : desc);
     return 1;
   } else {
-    fprintf(stderr, "%s: %s, %s ... " COL_RED "FAILED\n" COL_STOP,
-	    preamble, desc, comment);
+    fprintf(stderr, "%s: %s ... " COL_RED "FAILED\n" COL_STOP,
+	    preamble, comment ? comment : desc);
     fprintf(stderr, "  Expected: 0x%x (%d), got: 0x%x (%d)\n",
 	    expected, expected, result, result);
     gTestSuccess = 0;