diff --git a/builders/Linux/Dockerfile b/builders/Linux/Dockerfile
index de823d1..a01b6c8 100644
--- a/builders/Linux/Dockerfile
+++ b/builders/Linux/Dockerfile
@@ -47,7 +47,7 @@ RUN echo "mediafx ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/mediafx && chmod 044
 VOLUME /mediafx
 WORKDIR /mediafx/build/Linux
 
-ENTRYPOINT ["/usr/bin/xvfb-run", "--error-file", "/dev/stderr", "/entrypoint.sh"]
+ENTRYPOINT ["/usr/bin/xvfb-run", "--server-args", "-screen 0 640x480x24", "--error-file", "/dev/stderr", "/entrypoint.sh"]
 
 
 FROM base as mediafx
diff --git a/builders/Linux/mediafx-build.sh b/builders/Linux/mediafx-build.sh
index 1bea405..cd79403 100755
--- a/builders/Linux/mediafx-build.sh
+++ b/builders/Linux/mediafx-build.sh
@@ -17,8 +17,10 @@
 cd "$(dirname "${BASH_SOURCE[0]}")/../../build/Linux" || exit 1
 (cmake --install-prefix /usr/local/Qt/${QT_VER:?}/gcc_64 ../.. && cmake --build . && sudo cmake --install .) || exit 1
 if [[ -v MEDIAFX_TEST ]]; then
+    sudo apt install -y mesa-utils #XXX
     export GALLIUM_DRIVER=softpipe
     export LIBGL_ALWAYS_SOFTWARE=1
     export DRI_NO_MSAA=1
+    glxinfo
     make test CTEST_OUTPUT_ON_FAILURE=1 ARGS="${MEDIAFX_TEST}" || exit 1
 fi
\ No newline at end of file