diff --git a/test/test.hs b/test/test.hs
index 0251552..dc799a7 100644
--- a/test/test.hs
+++ b/test/test.hs
@@ -214,7 +214,7 @@ wrap :: (ThreadGroup -> Fork a) -> (Fork a -> IO b) -> IO b
 wrap doFork test = ThreadGroup.new >>= test . doFork
 
 test_group_single_wait :: (ThreadGroup -> Fork ()) -> Assertion
-test_group_single_wait doFork = assert $ fmap isJustTrue $ timeout (10 * a_moment) $ do
+test_group_single_wait doFork = assert $ fmap isJustTrue $ timeout (100 * a_moment) $ do
   tg <- ThreadGroup.new
   r <- newIORef False
   _ <- doFork tg $ do