diff --git a/docker-run_tests.sh b/docker-run_tests.sh
index 79cf657..b6bf6da 100755
--- a/docker-run_tests.sh
+++ b/docker-run_tests.sh
@@ -1,10 +1,30 @@
-#!/bin/bash 
+#!/bin/bash
 # A script to test the official CentOS docker-images.
 # Author: Athmane Madjoudj <athmane@fedoraproject.org>
 
 EPEL6_RELEASE_URL="http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm"
 EPEL6_GPGKEY_URL="https://fedoraproject.org/static/0608B895.txt"
 
+# A function to test an output of a command 
+# arg1: Command to run 
+# arg2: Expected output
+#
+expect_output(){
+    if [ -z "$2" ]
+    then
+        printf "We need two args\n"
+        return 98
+    fi
+    $1 | grep "$2"
+    if [ $? -eq 0 ]
+    then
+        printf "Test PASSED\n"
+    else
+        printf "Test \'$1\' FAILED: expecting %s\n" $2
+    fi
+    
+}
+
 enable_epel() {
     printf "Installing EPEL and some tools ...\n"
     yum -y install wget openssh-clients
@@ -26,13 +46,20 @@ test_get_centos_img() {
     docker pull centos
 }
 
+test_centos_img_installed(){
+    printf "TEST 2: Checking if CentOS image was installed correctly ...\n"
+    expect_output 'docker images' 'centos'
+
+}
+
 test_centos_img_runcmd() {
-    printf "TEST 2: Running a command inside CentOS image ...\n"
-    docker run centos cat /etc/centos-release | grep 'CentOS'
+    printf "TEST 3: Running a command inside CentOS image ...\n"
+    expect_output 'docker run centos cat /etc/centos-release' 'CentOS'
 }
 
 run_tests() {
     test_get_centos_img
+    test_centos_img_installed
     test_centos_img_runcmd
 }