diff --git a/tests/runtests.pl b/tests/runtests.pl
index 3e86abd5a..921cd28bf 100755
--- a/tests/runtests.pl
+++ b/tests/runtests.pl
@@ -591,7 +591,7 @@ sub singletest {
     my $cmdargs;
     if(!$tool) {
         # run curl, add -v for debug information output
-        $cmdargs ="$out--include -v $cmd";
+        $cmdargs ="$out --include -v $cmd";
     }
     else {
         $cmdargs = " $cmd"; # $cmd is the command line for the test file