diff --git a/test/headers-overlay.sh b/test/headers-overlay.sh
index be92eff..176623e 100755
--- a/test/headers-overlay.sh
+++ b/test/headers-overlay.sh
@@ -18,8 +18,9 @@ int main() { return 0; }
 SOURCE
 
   echo "testing header $inc"
-  run $CC -isystem "$incdir" $CPPFLAGS headers-overlay-gen.c -o /dev/null
+  run $CC -isystem "$incdir" $CPPFLAGS headers-overlay-gen.c -o headers-overlay
   echo
 
+  rm -f headers-overlay
   rm -f headers-overlay-gen*
 done
diff --git a/test/headers-system.sh b/test/headers-system.sh
index 5ff0517..458fbbb 100755
--- a/test/headers-system.sh
+++ b/test/headers-system.sh
@@ -17,8 +17,9 @@ int main() { return 0; }
 SOURCE
 
   echo "testing header $inc"
-  run $CC -isystem "$incdir" $CPPFLAGS headers-system-gen.c -o /dev/null
+  run $CC -isystem "$incdir" $CPPFLAGS headers-system-gen.c -o headers-system
   echo
 
+  rm -f headers-system
   rm -f headers-system-gen.*
 done