diff --git a/lib/tests/test-mu-store-query.cc b/lib/tests/test-mu-store-query.cc
index 57a6a716..5f282863 100644
--- a/lib/tests/test-mu-store-query.cc
+++ b/lib/tests/test-mu-store-query.cc
@@ -16,7 +16,7 @@
 ** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 **
 */
-
+#include "config.h"
 
 #include "utils/mu-result.hh"
 #include <array>
@@ -148,6 +148,9 @@ I said: "Aujourd'hui!"
 			"to:sqlite-dev@sqlite.org",
 			"list:sqlite-dev.sqlite.org",
 			"aujourd'hui",
+#ifdef HAVE_CLD2
+			"lang:en",
+#endif /*HAVE_CLD2*/
 		}) {
 
 		if (g_test_verbose())
diff --git a/mu/tests/test-mu-query.cc b/mu/tests/test-mu-query.cc
index 23f13d41..09c0cdeb 100644
--- a/mu/tests/test-mu-query.cc
+++ b/mu/tests/test-mu-query.cc
@@ -135,6 +135,9 @@ test_mu_query_01(void)
 	    { "", 19 },
 	    {"msgid:abcd$efgh@example.com", 1},
 	    {"i:abcd$efgh@example.com", 1},
+#ifdef HAVE_CLD2
+{	    "lang:en",  14},
+#endif /*HAVE_CLD2*/
 	};
 
 	for (i = 0; i != G_N_ELEMENTS(queries); ++i)