diff --git a/tests/runtests.pl b/tests/runtests.pl
index 2a10e5f7b5..06ff733f62 100755
--- a/tests/runtests.pl
+++ b/tests/runtests.pl
@@ -2627,7 +2627,7 @@ sub singletest {
         }
     }
 
-    $CMDLINE .= "$cmdargs >>$STDOUT 2>>$STDERR";
+    $CMDLINE .= "$cmdargs >$STDOUT 2>$STDERR";
 
     if($verbose) {
         logmsg "$CMDLINE\n";