diff --git a/Makefile.in b/Makefile.in
index 998ca277..cceee44d 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -351,7 +351,7 @@ bin/testunix.opt: $(CMXA) myTest/testunix.ml
 	$(OCAMLOPT) -unsafe -inline 100 -o $@ unix.cmxa $^
 
 check: $(CMA) tests/check.ml bin/test-ts
-	ocaml $(CMA) tests/check.ml
+	ocaml $(CMA) tests/test_clique.ml tests/check.ml
 	bin/test-ts 10
 
 # Additional rules
diff --git a/tests/check.ml b/tests/check.ml
index 03bf7b7b..52aa1a25 100644
--- a/tests/check.ml
+++ b/tests/check.ml
@@ -688,6 +688,8 @@ module TestSigPack : RightSigPack = struct
   type g = t
 end
 
+include Test_clique
+
 (*
 Local Variables:
 compile-command: "make -C .. check"