diff --git a/ansible/Vagrantfile b/ansible/Vagrantfile
index 748085a232..ce6ac3dde6 100644
--- a/ansible/Vagrantfile
+++ b/ansible/Vagrantfile
@@ -60,7 +60,8 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   		# see http://askubuntu.com/questions/238040/how-do-i-fix-name-service-for-vagrant-client
 	    vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
 
-        vb.customize ["modifyvm", :id, "--memory", "1024"]
+		# cpp client needs a lot of RAM to build
+        vb.customize ["modifyvm", :id, "--memory", "2048"]
   end
   
   #
diff --git a/ansible/test-files/testrunner.sh b/ansible/test-files/testrunner.sh
index 08b21c88e4..dabea7fb38 100644
--- a/ansible/test-files/testrunner.sh
+++ b/ansible/test-files/testrunner.sh
@@ -4,7 +4,7 @@
 #cd ~/software/Ethereum/pyethereum (python has local dependencies so only works from within the directory)
 while [ 1 ]
 do	
-	TEST="$(~/software/Ethereum/cpp-ethereum/build/test/createRandomTest)"
+	TEST="$(docker run --rm cpp)"
 	# echo "$TEST"
 
 	# test pyethereum
@@ -13,7 +13,7 @@ do
 	 #RESULT_PYTHON=$?
 
 	# test go
-	 OUTPUT_GO="$(ethtest "$TEST")"
+	 OUTPUT_GO="$(docker run --rm go "$TEST")"
 	 RESULT_GO=$?
 
 	# test cpp-jit