diff --git a/tests/case_utils/case_file/Makefile b/tests/case_utils/case_file/Makefile
index 1f55f1d..254a27d 100644
--- a/tests/case_utils/case_file/Makefile
+++ b/tests/case_utils/case_file/Makefile
@@ -61,15 +61,15 @@ kb.json: \
 	mv _$@ $@
 
 kb.ttl: \
-  $(tests_srcdir)/src/glom_graph.py \
   sample.txt.ttl \
   sample.txt-disable_hashes.ttl \
   sample.txt-nocompact.json
 	source $(tests_srcdir)/venv/bin/activate \
-	  && python3 $(tests_srcdir)/src/glom_graph.py \
-	    __$@ \
+	  && rdfpipe \
+	    --output-format turtle \
 	    sample.txt.ttl \
-	    sample.txt-disable_hashes.ttl
+	    sample.txt-disable_hashes.ttl \
+	    > __$@
 	java -jar $(RDF_TOOLKIT_JAR) \
 	  --infer-base-iri \
 	  --inline-blank-nodes \
diff --git a/tests/src/glom_graph.py b/tests/src/glom_graph.py
deleted file mode 100644
index e54d8ed..0000000
--- a/tests/src/glom_graph.py
+++ /dev/null
@@ -1,37 +0,0 @@
-#!/usr/bin/env python3
-
-# This software was developed at the National Institute of Standards
-# and Technology by employees of the Federal Government in the course
-# of their official duties. Pursuant to title 17 Section 105 of the
-# United States Code this software is not subject to copyright
-# protection and is in the public domain. NIST assumes no
-# responsibility whatsoever for its use by other parties, and makes
-# no guarantees, expressed or implied, about its quality,
-# reliability, or any other characteristic.
-#
-# We would appreciate acknowledgement if the software is used.
-
-"""
-This script takes multiple input JSON-LD or Turtle files and emits a single Turtle graph.
-"""
-
-__version__ = "0.2.1"
-
-import rdflib
-
-
-def main() -> None:
-    g = rdflib.Graph()
-    for in_graph in args.in_graph:
-        g.parse(in_graph)
-    g.serialize(args.out_graph)
-
-
-if __name__ == "__main__":
-    import argparse
-
-    parser = argparse.ArgumentParser()
-    parser.add_argument("out_graph")
-    parser.add_argument("in_graph", nargs="*")
-    args = parser.parse_args()
-    main()