diff --git a/tests/dockerfiles/Debian_testing.docker b/tests/dockerfiles/Debian_testing.docker
index 33ec8d1..a1010ed 100644
--- a/tests/dockerfiles/Debian_testing.docker
+++ b/tests/dockerfiles/Debian_testing.docker
@@ -23,7 +23,10 @@
 RUN mkdir /src/build
 WORKDIR /src/build
 RUN cmake .. && \
-    make && \
+    # The parallel build sometimes fails when the .grc_gnuradio
+    # and .gnuradio directories do not exist
+    mkdir $HOME/.grc_gnuradio/ $HOME/.gnuradio/ && \
+    make -j $(nproc) && \
     make install && \
     ldconfig && \
     make test