diff --git a/ggsn-test/Dockerfile b/ggsn-test/Dockerfile
index aa75316b..cb684f03 100644
--- a/ggsn-test/Dockerfile
+++ b/ggsn-test/Dockerfile
@@ -2,8 +2,13 @@ FROM	laforge/debian-stretch-titan
 
 RUN	git clone git://git.osmocom.org/osmo-ttcn3-hacks.git
 
+RUN	cd osmo-ttcn3-hacks && \
+	git checkout -f -B master origin/master && \
+	make deps
+
 ADD	http://git.osmocom.org/osmo-ttcn3-hacks/patch /tmp/commit
 RUN	cd osmo-ttcn3-hacks && \
+	git fetch && \
 	git checkout -f -B master origin/master && \
 	make ggsn_tests
 
diff --git a/mgw-test/Dockerfile b/mgw-test/Dockerfile
index fa84e354..2c904761 100644
--- a/mgw-test/Dockerfile
+++ b/mgw-test/Dockerfile
@@ -3,8 +3,13 @@ FROM	laforge/debian-stretch-titan
 RUN	mkdir /root/projects && (cd /root/projects && ln -sf / git)
 RUN	git clone git://git.osmocom.org/osmo-ttcn3-hacks.git
 
+RUN	cd osmo-ttcn3-hacks && \
+	git checkout -f -B master origin/master && \
+	make deps
+
 ADD	http://git.osmocom.org/osmo-ttcn3-hacks/patch /tmp/commit
 RUN	cd osmo-ttcn3-hacks && \
+	git fetch && \
 	git checkout -f -B master origin/master && \
 	make mgw
 
diff --git a/ttcn3-nitb-sysinfo/Dockerfile b/ttcn3-nitb-sysinfo/Dockerfile
index 7ffaa261..b7921ac3 100644
--- a/ttcn3-nitb-sysinfo/Dockerfile
+++ b/ttcn3-nitb-sysinfo/Dockerfile
@@ -3,8 +3,13 @@ FROM	laforge/debian-stretch-titan
 RUN	mkdir /root/projects && (cd /root/projects && ln -sf / git)
 RUN	git clone git://git.osmocom.org/osmo-ttcn3-hacks.git
 
+RUN	cd osmo-ttcn3-hacks && \
+	git checkout -f -B master origin/master && \
+	make deps
+
 ADD	http://git.osmocom.org/osmo-ttcn3-hacks/patch /tmp/commit
 RUN	cd osmo-ttcn3-hacks && \
+	git fetch && \
 	git checkout -f -B master origin/master && \
 	make sysinfo