diff --git a/tools/tests/Makefile b/tools/tests/Makefile
index e44faa9..941ce75 100644
--- a/tools/tests/Makefile
+++ b/tools/tests/Makefile
@@ -1,4 +1,5 @@
 EMULDIR = ../emul
+CFSPACK = ../cfspack/cfspack
 
 .PHONY: run
 run:
@@ -6,3 +7,10 @@ run:
 	cd unit && ./runtests.sh
 	cd zasm && ./runtests.sh
 	cd shell && ./runtests.sh
+
+$(CFSPACK):
+	$(MAKE) -C ../cfspack
+
+.PHONY: cfs
+cfs: $(CFSPACK)
+	$(CFSPACK) shell/cfsin > shell/test.cfs
diff --git a/tools/tests/shell/.gitignore b/tools/tests/shell/.gitignore
deleted file mode 100644
index c58b0ca..0000000
--- a/tools/tests/shell/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-/test.cfs
diff --git a/tools/tests/shell/runtests.sh b/tools/tests/shell/runtests.sh
index c583734..0972641 100755
--- a/tools/tests/shell/runtests.sh
+++ b/tools/tests/shell/runtests.sh
@@ -17,8 +17,6 @@ replay() {
     fi
 }
 
-../../cfspack/cfspack cfsin > test.cfs
-
 if [ ! -z $1 ]; then
     replay $1
     exit 0
diff --git a/tools/tests/shell/test.cfs b/tools/tests/shell/test.cfs
new file mode 100644
index 0000000..f9fb1b6
Binary files /dev/null and b/tools/tests/shell/test.cfs differ