diff --git a/scripts/test_csmith.pl b/scripts/test_csmith.pl
index 9a2925fe7..6ccdeb079 100755
--- a/scripts/test_csmith.pl
+++ b/scripts/test_csmith.pl
@@ -53,7 +53,7 @@
 
 #######################################################################
 
-my $HEADER = "-I${CSMITH_HOME}/runtime";
+my $HEADER = "-I${CSMITH_HOME}/runtime -DCSMITH_MINIMAL";
 
 # properly parse the return value from system()
 sub runit ($$) {
@@ -79,8 +79,9 @@ ($)
 sub run_test () {
     my $cfile = "test.c";
     my $ofile = "test.exe";
+    my $ofile_kcc = "test_kcc.exe";
 
-    system "rm -f $cfile";
+    system "rm -f $cfile $ofile $ofile_kcc";
 
     my $CSMITH_OPTIONS = "";
     if (rand()<0.5) { $CSMITH_OPTIONS .= " --quiet "; }
@@ -138,14 +139,14 @@ ()
     
     if ($RUN_KCC) {
 	
-	my $cmd3 = "kcc $cfile $HEADER -o $ofile";
+	my $cmd3 = "kcc $cfile $HEADER -o $ofile_kcc";
 	$res = runit ($cmd3, "csmith.out"); 
-	if ($res != 0 || !(-f $ofile)) {
+	if ($res != 0 || !(-f $ofile_kcc)) {
 	    print "KCC failed to compile program generated by $cmd\n";
 	    exit (-1);
 	}	    
 	
-	my $cmd4 = "RunSafely.sh 600 1 /dev/null out.txt ./$ofile";
+	my $cmd4 = "RunSafely.sh 600 1 /dev/null out.txt ./$ofile_kcc";
 	$res = runit ($cmd4, "out2.txt");
 	if ($res != 0 && $res != 137) {
 	    print "KCC output died with error code $res\n";