diff --git a/.docker/build-arch.sh b/.docker/build-arch.sh
index 950ae21..5308d77 100755
--- a/.docker/build-arch.sh
+++ b/.docker/build-arch.sh
@@ -11,4 +11,4 @@ cmake -DKDE_INSTALL_USE_QT_SYS_PATHS=ON -DCMAKE_BUILD_TYPE=Optimization -DCMAKE_
 make
 
 # tests
-xvfb-run make test
+xvfb-run -a make test
diff --git a/.docker/build-ubuntu.sh b/.docker/build-ubuntu.sh
index 9ec2661..68ec9f8 100755
--- a/.docker/build-ubuntu.sh
+++ b/.docker/build-ubuntu.sh
@@ -15,4 +15,4 @@ cmake -DKDE_INSTALL_USE_QT_SYS_PATHS=ON -DCMAKE_BUILD_TYPE=Optimization -DCMAKE_
 make
 
 # tests
-xvfb-run make test
+xvfb-run -a make test
diff --git a/README.md b/README.md
index 242ac79..5b5feaa 100644
--- a/README.md
+++ b/README.md
@@ -58,6 +58,10 @@ Installation
 
   **NOTE** on Plasma 5 it very likely requires `-DKDE_INSTALL_USE_QT_SYS_PATHS=ON` flag
 
+  **NOTE** if you are going to build from git, you need to init submodules first, e.g.:
+
+        git submodule update --init --recursive
+
 Additional information
 ======================