diff --git a/all.sh b/all.sh
new file mode 100755
index 00000000..8f6032be
--- /dev/null
+++ b/all.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+KERL_INSTALL_PATH=~/erlang
+KERL_RELEASES="r15b01 r15b02 r15b03 r16b r16b01 r16b02 r16b03 maint master"
+
+make build-tests
+
+for rel in $KERL_RELEASES
+do
+	echo
+	echo "    TESTING $rel"
+	echo
+	. $KERL_INSTALL_PATH/$rel/activate
+	cp ~/.kerl/builds/$rel/otp_src_*/lib/ssl/test/erl_make_certs.erl \
+		deps/ct_helper/src/
+	CT_OPTS="-label $rel" make tests
+done
+
+xdg-open logs/all_runs.html
diff --git a/erlang.mk b/erlang.mk
index 107cdd5f..1e0a05e1 100644
--- a/erlang.mk
+++ b/erlang.mk
@@ -216,13 +216,14 @@ build-tests: build-test-deps
 	$(gen_verbose) erlc -v $(ERLC_OPTS) -o test/ \
 		$(wildcard test/*.erl test/*/*.erl) -pa ebin/
 
+CT_OPTS ?=
 CT_RUN = ct_run \
 	-no_auto_compile \
 	-noshell \
 	-pa $(realpath ebin) $(DEPS_DIR)/*/ebin \
 	-dir test \
-	-logdir logs
-#	-cover test/cover.spec
+	-logdir logs \
+	$(CT_OPTS)
 
 CT_SUITES ?=