diff --git a/browser-asmjs/Dockerfile.in b/browser-asmjs/Dockerfile.in
index 16c66e6..09141fb 100644
--- a/browser-asmjs/Dockerfile.in
+++ b/browser-asmjs/Dockerfile.in
@@ -16,19 +16,6 @@ ENV CC=/emsdk_portable/emscripten/tag-${EMSCRIPTEN_VERSION}/emcc \
   CXX=/emsdk_portable/emscripten/tag-${EMSCRIPTEN_VERSION}/em++ \
   AR=/emsdk_portable/emscripten/tag-${EMSCRIPTEN_VERSION}/emar
 
-# Emscripten generates system libraries the firsts time it runs
-ADD test/ /tmp/test/
-RUN cd /tmp && \
-  /bin/echo -e "#include <iostream>\nint main() { std::cout << \"first run\"; return 0; }" > /tmp/first_run.cxx && \
-  $CXX /tmp/first_run.cxx -o a.out.js && \
-  rm /tmp/first_run.* && \
-  /bin/echo -e "#include <stdio.h>\nint main() { printf(\"first run\"); return 0; }" > /tmp/first_run.c && \
-  $CC /tmp/first_run.c -o a.out.js && \
-  rm /tmp/first_run.* a.out.js && \
-  cd /tmp/test && \
-  python /tmp/test/run.py; python /tmp/test/run.py && \
-  cd && rm -rf /tmp/test
-
 ENV DEFAULT_DOCKCROSS_IMAGE dockcross/browser-asmjs
 
 ENV CMAKE_TOOLCHAIN_FILE /emsdk_portable/emscripten/tag-${EMSCRIPTEN_VERSION}/cmake/Modules/Platform/Emscripten.cmake