1 files changed, 26 insertions, 0 deletions
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.arithmetic/op_-=.pass.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.arithmetic/op_-=.pass.cpp
new file mode 100644
index 00000000000..a0a7aed202b
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.arithmetic/op_-=.pass.cpp
@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <chrono>
+
+// duration
+
+// duration& operator-=(const duration& d);
+
+#include <chrono>
+#include <cassert>
+
+int main()
+{
+    std::chrono::seconds s(3);
+    s -= std::chrono::seconds(2);
+    assert(s.count() == 1);
+    s -= std::chrono::minutes(2);
+    assert(s.count() == -119);
+}