diff --git a/buildbot/master/files/config/factories.py b/buildbot/master/files/config/factories.py
index 6c4e363d..77ec666b 100644
--- a/buildbot/master/files/config/factories.py
+++ b/buildbot/master/files/config/factories.py
@@ -126,7 +126,7 @@ def make_win_command(command):
     # heuristics used by DynamicServoFactory.make_step
     steps.Compile(command=make_win_command("./mach build -d -v"),
                   env=envs.build_windows),
-    steps.Compile(command=make_win_command("./mach test-unit"),
-                  env=envs.build_windows),
+    steps.Test(command=make_win_command("./mach test-unit"),
+               env=envs.build_windows),
     # TODO: run lockfile_changed.sh and manifest_changed.sh scripts
 ])