diff --git a/tests/scripts/curves.pl b/tests/scripts/curves.pl
index 85eb7e6..bd13f52 100755
--- a/tests/scripts/curves.pl
+++ b/tests/scripts/curves.pl
@@ -49,7 +49,8 @@
     system( "scripts/config.pl unset $curve" )
         and abort "Failed to disable $curve\n";
 
-    system( "make lib" ) and abort "Failed to build lib: $curve\n";
+    system( "CFLAGS='-Werror -Wall -Wextra' make lib" )
+        and abort "Failed to build lib: $curve\n";
     system( "cd tests && make" ) and abort "Failed to build tests: $curve\n";
     system( "make test" ) and abort "Failed test suite: $curve\n";