diff --git a/docs/docker/Dockerfile.bionic b/docs/docker/Dockerfile.bionic
index 1e70c5109b..7aec4d75b2 100644
--- a/docs/docker/Dockerfile.bionic
+++ b/docs/docker/Dockerfile.bionic
@@ -49,7 +49,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libnss3 \
     libxss1 \
     libasound2 \
-    fonts-noto-color-emoji
+    fonts-noto-color-emoji \
+    libxtst6
 
 # 5. Install Firefox dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \