diff --git a/test/run.py b/test/run.py
index fd3887a9..d324dfc0 100755
--- a/test/run.py
+++ b/test/run.py
@@ -111,7 +111,6 @@ def runCMake(sanitizer, buildDir):
     -B"{buildDir}" \
     -DCMAKE_BUILD_TYPE={CMAKE_BUILD_TYPE} \
     -DUSE_TLS=1 \
-    -DUSE_MBED_TLS=1 \
     -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
     -DUSE_VENDORED_THIRD_PARTY={USE_VENDORED_THIRD_PARTY} \
     -G{generator}'