diff --git a/test/albedo_test_runner.erl b/test/albedo_test_runner.erl
index 4c3df4ac..52033f0a 100644
--- a/test/albedo_test_runner.erl
+++ b/test/albedo_test_runner.erl
@@ -1,6 +1,8 @@
 %% gleeunit's runner with every test module started at once, after the timed
 %% ones. A module's tests keep running in order, one after another, so tests
-%% that share a module's fixtures never race each other. There is no cap:
+%% that share a module's fixtures never race each other: each module is its own
+%% {inorder, _} group, since a bare module under {inparallel, _} inherits that
+%% order and runs its tests concurrently too. There is no cap:
 %% eunit's {inparallel, N, _} runs batches of N and waits out each batch's
 %% slowest module.
 -module(albedo_test_runner).
@@ -30,7 +32,8 @@ main() ->
         {report, {gleeunit_progress, [{colored, true}]}},
         {scale_timeouts, 10}
     ],
-    Result = eunit:test([{inorder, Timed}, {inparallel, Modules -- Timed}], Options),
+    Result = eunit:test(
+        [{inorder, Timed}, {inparallel, [{inorder, M} || M <- Modules -- Timed]}], Options),
     albedo_test_home:cleanup(),
     erlang:halt(case Result of ok -> 0; _ -> 1 end).