diff --git a/makefiles/Makefile.cpp.mk b/makefiles/Makefile.cpp.mk
index e15a67377c..2f95bcf5dd 100644
--- a/makefiles/Makefile.cpp.mk
+++ b/makefiles/Makefile.cpp.mk
@@ -64,6 +64,7 @@ third_party:
  -DBUILD_PYTHON=$(BUILD_PYTHON) \
  -DBUILD_EXAMPLES=OFF \
  -DBUILD_SAMPLES=OFF \
+ -DBUILD_TESTING=OFF \
  -DUSE_COINOR=$(USE_COINOR) \
  -DUSE_GLPK=$(USE_GLPK) \
  -DUSE_HIGHS=$(USE_HIGHS) \