Removed calls to 'cd' bash command and replaced it with WORKDIR
which should work better according to docker's manual
diff --git a/tests/dockerfiles/Debian_testing.docker b/tests/dockerfiles/Debian_testing.docker
index 24dde82..4b3bced 100644
--- a/tests/dockerfiles/Debian_testing.docker
+++ b/tests/dockerfiles/Debian_testing.docker
@@ -1,7 +1,7 @@
 FROM debian:testing
+MAINTAINER Ash Wilson
 
 RUN apt-get update && apt-get install -y \
-    uhd-host \
     cmake \
     autoconf \
     libtool \
@@ -18,9 +18,9 @@
 COPY ./ /src/
 RUN ls /src
 
-RUN mkdir /src/build && \
-    cd /src/build && \
-    cmake .. && \
+RUN mkdir /src/build
+WORKDIR /src/build
+RUN cmake .. && \
     make && \
     make install && \
     ldconfig
diff --git a/tests/dockerfiles/Ubuntu_15_04.docker b/tests/dockerfiles/Ubuntu_15_04.docker
index 74304bd..58ef22c 100644
--- a/tests/dockerfiles/Ubuntu_15_04.docker
+++ b/tests/dockerfiles/Ubuntu_15_04.docker
@@ -9,7 +9,7 @@
      sed -i "s/Status: install ok half-configured/Status: install ok installed/g" /var/lib/dpkg/status
 
 
-RUN apt-get install -y \
+RUN apt-get update && apt-get install -y \
     git \
     python \
     python-scipy \
@@ -55,9 +55,9 @@
     unzip
 
 # Build libosmosdr
- RUN git clone $OSMOSDR_GIT && \
-    cd libosmocore && \
-    git checkout tags/$OSMOCORE_TAG && \
+RUN git clone $OSMOSDR_GIT
+WORKDIR libosmocore
+RUN git checkout tags/$OSMOCORE_TAG && \
     autoreconf -i && \
     ./configure && \
     make && \
@@ -70,10 +70,10 @@
 RUN echo "[grc]\nlocal_blocks_path=/usr/local/share/gnuradio/grc/blocks" > \
     /root/.gnuradio/config.conf
 
-RUN mkdir /src/build && \
-    cd /src/build && \
-    cmake .. && \
+RUN mkdir /src/build
+WORKDIR /src/build
+RUN cmake .. && \
     make && \
-    # make test && \
+    make test && \
     make install && \
     ldconfig
diff --git a/tests/dockerfiles/Ubuntu_16_04.docker b/tests/dockerfiles/Ubuntu_16_04.docker
index de0b215..ac3e549 100644
--- a/tests/dockerfiles/Ubuntu_16_04.docker
+++ b/tests/dockerfiles/Ubuntu_16_04.docker
@@ -2,7 +2,6 @@
 MAINTAINER Ash Wilson
 
 RUN apt-get update && apt-get install -y \
-    uhd-host \
     cmake \
     autoconf \
     libtool \
@@ -19,9 +18,9 @@
 COPY ./ /src/
 RUN ls /src
 
-RUN mkdir /src/build && \
-    cd /src/build && \
-    cmake .. && \
+RUN mkdir /src/build
+WORKDIR /src/build
+RUN cmake .. && \
     make && \
     make install && \
     ldconfig
diff --git a/tests/dockerfiles/Ubuntu_16_04_debbuild.docker b/tests/dockerfiles/Ubuntu_16_04_debbuild.docker
index ea34f67..030ece8 100644
--- a/tests/dockerfiles/Ubuntu_16_04_debbuild.docker
+++ b/tests/dockerfiles/Ubuntu_16_04_debbuild.docker
@@ -2,7 +2,6 @@
 MAINTAINER Ash Wilson
 
 RUN apt-get update && apt-get install -y \
-    uhd-host \
     cmake \
     autoconf \
     libtool \
@@ -19,9 +18,9 @@
 COPY ./ /src/
 RUN ls /src
 
-RUN mkdir /src/build && \
-    cd /src/build && \
-    cmake .. && \
+RUN mkdir /src/build
+WORKDIR /src/build
+RUN cmake .. && \
     make package && \
     cpack -G DEB && \
     ls