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-rw-r--r--libraries/base/tests/IO/all.T3
1 files changed, 1 insertions, 2 deletions
diff --git a/libraries/base/tests/IO/all.T b/libraries/base/tests/IO/all.T
index 9475183b3c..a2aac9f37f 100644
--- a/libraries/base/tests/IO/all.T
+++ b/libraries/base/tests/IO/all.T
@@ -86,8 +86,7 @@ test('hGetBuf001',
expect_fail_if_windows],
compile_and_run, ['-package unix'])
-# As discussed in #16819, this test is racy in a threaded environment.
-test('hDuplicateTo001', [omit_ways(concurrent_ways),
+test('hDuplicateTo001', [fragile_for(16819, concurrent_ways),
when(opsys('mingw32'), skip)], compile_and_run, [''])
test('countReaders001', [], compile_and_run, [''])