diff --git a/tests/Makefile b/tests/Makefile
index 67c3427..d9ab0d5 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -32,6 +32,7 @@ all: \
   monolithic.ttl
 	source $(top_srcdir)/venv/bin/activate \
 	  && pyshacl \
+	    --metashacl \
 	    --ont-graph monolithic.ttl \
 	    --shacl monolithic.ttl \
 	    exemplars.ttl