diff --git a/makefiles/docker.inc.mk b/makefiles/docker.inc.mk
index b3d0035313..9012516ea8 100644
--- a/makefiles/docker.inc.mk
+++ b/makefiles/docker.inc.mk
@@ -67,7 +67,6 @@ export DOCKER_ENV_VARS += \
   SCANBUILD_ARGS \
   SCANBUILD_OUTPUTDIR \
   SIZE \
-  TEST_KCONFIG \
   TOOLCHAIN \
   UNDEF \
   WERROR \