diff --git a/tests/commandhelper.c b/tests/commandhelper.c
index bf6a5baa40..b3c65ab3cc 100644
--- a/tests/commandhelper.c
+++ b/tests/commandhelper.c
@@ -156,6 +156,9 @@ static int printEnvironment(FILE *log)
     for (length = 0; environ[length]; length++) {
     }
 
+    if (length == 0)
+        return 0;
+
     if (!(newenv = malloc(sizeof(*newenv) * length)))
         return -1;