diff --git a/ci/external-gccarm.yml b/ci/external-gccarm.yml
index 9c1eba9d..8985a1ba 100644
--- a/ci/external-gccarm.yml
+++ b/ci/external-gccarm.yml
@@ -8,3 +8,6 @@ local_conf_header:
     SKIP_RECIPE[gcc-cross-arm] = "Using external toolchain"
     TCMODE = "external-arm"
     EXTERNAL_TOOLCHAIN = "${TOPDIR}/toolchains/${TARGET_ARCH}"
+    # Disable ptest as this pulls target compilers, which don't
+    # work with external toolchain currently
+    DISTRO_FEATURES:remove = "ptest"