diff --git a/tests/Makefile b/tests/Makefile
index c78882c..04dcf09 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -20,7 +20,8 @@ top_srcdir := ..
 
 all: \
   InvestigativeAction.json \
-  ArchiveFile.json
+  ArchiveFile.json \
+  Bag.json
 
 ArchiveFile.json: \
   $(top_srcdir)/.venv.done.log \
@@ -39,6 +40,23 @@ ArchiveFile.json: \
 	rm __$@
 	mv _$@ $@
 
+Bag.json: \
+  $(top_srcdir)/.venv.done.log \
+  $(top_srcdir)/src/generate_single_stub_json.py \
+  $(top_srcdir)/var/facet_cardinalities.ttl
+	rm -f __$@ _$@
+	source $(top_srcdir)/venv/bin/activate \
+	  && python $(top_srcdir)/src/generate_single_stub_json.py \
+	    --debug \
+	    __$@ \
+	    http://purl.org/co/Bag \
+	    $(top_srcdir)/var/facet_cardinalities.ttl
+	python3 -m json.tool \
+	  __$@ \
+	  _$@
+	rm __$@
+	mv _$@ $@
+
 InvestigativeAction.json: \
   $(top_srcdir)/.venv.done.log \
   $(top_srcdir)/src/generate_single_stub_json.py \