diff --git a/tests/Dockerfile b/tests/Dockerfile
index 7f2b44c..393006a 100644
--- a/tests/Dockerfile
+++ b/tests/Dockerfile
@@ -44,7 +44,8 @@ RUN rm -rf vendor/libplum/build && \
     -DCMAKE_BUILD_TYPE=Release \
     -DBUILD_SHARED_LIBS=OFF \
     vendor/libplum && \
-    cmake --build vendor/libplum/build
+    cmake --build vendor/libplum/build && \
+    cp vendor/libplum/build/libplum.a vendor/libplum/libplum.a
 
 # Compile test binaries (protocol x memory manager)
 COPY tests/ tests/