diff --git a/ynh-dev b/ynh-dev
index 8f2c50c..4c17186 100755
--- a/ynh-dev
+++ b/ynh-dev
@@ -17,6 +17,8 @@ function show_usage() {
   ip              Give the ip of the guest container
   use-git [PKG]   Use Git repositories from dev environment path
   test [PKG]      Deploy, update and run tests for some packages
+                  Tests for single modules and functions can ran with
+                  e.g. ./ynh-dev test yunohost/appurl:urlavailable
 
 EOF
 }
@@ -270,10 +272,14 @@ function run_tests()
     local PACKAGES="$@"
     for PACKAGE in "$PACKAGES";
     do
+        TEST_FUNCTION=$(echo "$PACKAGE" | tr '/:' ' ' | awk '{print $3}')
+        TEST_MODULE=$(echo "$PACKAGE" | tr '/:' ' ' | awk '{print $2}')
+        PACKAGE=$(echo "$PACKAGE" | tr '/:' ' ' | awk '{print $1}')
+
         case $PACKAGE in
             yunohost)
                 # Pytest and tests dependencies
-                if ! type "pytest" > /dev/null; then
+                if ! type "pytest" > /dev/null 2>&1; then
                     info "> Installing pytest ..."
                     apt-get install python-pip -y
                     pip2 install pytest
@@ -293,12 +299,23 @@ function run_tests()
                 git pull > /dev/null 2>&1
 
                 # Run tests
-                info "Running tests for YunoHost ..."
+                info "Running tests for YunoHost"
                 [ -e "/etc/yunohost/installed" ] || critical "You should run postinstallation before running tests :s."
-                cd /ynh-dev/yunohost/
-                py.test tests
-                cd /ynh-dev/yunohost/src/yunohost
-                py.test tests
+                if [[ -z "$TEST_MODULE" ]]
+                then
+                    cd /ynh-dev/yunohost/
+                    py.test tests
+                    cd /ynh-dev/yunohost/src/yunohost
+                    py.test tests
+                else
+                    cd /ynh-dev/yunohost/src/yunohost
+                    if [[ -z "$TEST_FUNCTION" ]]
+                    then
+                        py.test tests/test_"$TEST_MODULE".py
+                    else
+                        py.test tests/test_"$TEST_MODULE".py::test_"$TEST_FUNCTION"
+                    fi
+                fi
                 ;;
         esac
     done