diff --git a/testsuite/tests/driver/T16608/Makefile b/testsuite/tests/driver/T16608/Makefile
index f3a6fae9bead67fe0c25c63c6bd05f9b6c1cfdb1..7cec19026bc66cac46b09bfec7d158cbffdf9e05 100644
--- a/testsuite/tests/driver/T16608/Makefile
+++ b/testsuite/tests/driver/T16608/Makefile
@@ -5,6 +5,7 @@ include $(TOP)/mk/test.mk
 T16608_1:
 	'$(TEST_HC)' $(TEST_HC_OPTS) --make -O0 T16608_1.hs
 	./T16608_1
+	sleep 1
 	sed -i -e 's/{- . succ -}/. succ/' MyInteger.hs
 	'$(TEST_HC)' $(TEST_HC_OPTS) --make -O0 T16608_1.hs
 	./T16608_1
@@ -12,6 +13,7 @@ T16608_1:
 T16608_2:
 	'$(TEST_HC)' $(TEST_HC_OPTS) --make -O0 T16608_2.hs
 	./T16608_2
+	sleep 1
 	sed -i -e 's/{- . succ -}/. succ/' MyInteger.hs
 	'$(TEST_HC)' $(TEST_HC_OPTS) --make -O0 T16608_2.hs
 	./T16608_2
diff --git a/testsuite/tests/driver/T16608/all.T b/testsuite/tests/driver/T16608/all.T
index 1f75e596d6e642cc02e6969990f1d91b55167706..5a1b8dc4887da95120f1922564b6878348b9e560 100644
--- a/testsuite/tests/driver/T16608/all.T
+++ b/testsuite/tests/driver/T16608/all.T
@@ -1,2 +1,2 @@
-test('T16608_1', [when(opsys('darwin'), fragile(16855)), extra_files(['MyInteger.hs'])], makefile_test, [])
-test('T16608_2', [when(opsys('darwin'), fragile(16855)), extra_files(['MyInteger.hs'])], makefile_test, [])
+test('T16608_1', [extra_files(['MyInteger.hs'])], makefile_test, [])
+test('T16608_2', [extra_files(['MyInteger.hs'])], makefile_test, [])