diff --git a/support/testing/tests/core/test_hardening.py b/support/testing/tests/core/test_hardening.py
index edfb3315db..60e14303a3 100644
--- a/support/testing/tests/core/test_hardening.py
+++ b/support/testing/tests/core/test_hardening.py
@@ -10,6 +10,7 @@ class TestHardeningBase(infra.basetest.BRTest):
         BR2_powerpc64=y
         BR2_powerpc_e5500=y
         BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
         BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
         BR2_TOOLCHAIN_EXTERNAL_URL="https://toolchains.bootlin.com/downloads/releases/toolchains/powerpc64-e5500/tarballs/powerpc64-e5500--glibc--stable-2018.02-2.tar.bz2"
         BR2_TOOLCHAIN_EXTERNAL_GCC_6=y