diff --git a/contrib/Dockerfile.builder b/contrib/Dockerfile.builder
index 11950f4a5..8b844484d 100644
--- a/contrib/Dockerfile.builder
+++ b/contrib/Dockerfile.builder
@@ -23,6 +23,7 @@ RUN apt-get -qq update && \
 	valgrind \
 	net-tools \
 	python3-pip \
+	python-pkg-resources \
 	wget && \
 	rm -rf /var/lib/apt/lists/*
 
@@ -32,4 +33,4 @@ RUN cd /tmp/ && \
     mv /tmp/bitcoin-0.15.0/bin/bitcoin* /usr/local/bin/ && \
     rm -rf bitcoin.tar.gz /tmp/bitcoin-0.15.0
 
-RUN pip3 install python-bitcoinlib==0.7.0
+RUN pip3 install python-bitcoinlib==0.7.0 pytest==3.0.5 setuptools==36.6.0
diff --git a/contrib/Dockerfile.builder.i386 b/contrib/Dockerfile.builder.i386
index b71fc7bbf..1a91fd9f9 100644
--- a/contrib/Dockerfile.builder.i386
+++ b/contrib/Dockerfile.builder.i386
@@ -23,7 +23,8 @@ RUN apt-get -qq update && \
 	valgrind \
 	net-tools \
 	python3-pip \
-        wget && \
+	python-pkg-resources \
+	wget && \
 	rm -rf /var/lib/apt/lists/*
 
 RUN cd /tmp/ && \
@@ -32,4 +33,4 @@ RUN cd /tmp/ && \
     mv /tmp/bitcoin-0.15.0/bin/bitcoin* /usr/local/bin/ && \
     rm -rf bitcoin.tar.gz /tmp/bitcoin-0.15.0
 
-RUN pip3 install python-bitcoinlib==0.7.0
+RUN pip3 install python-bitcoinlib==0.7.0 pytest==3.0.5 setuptools==36.6.0