2 files changed, 5 insertions, 4 deletions
diff --git a/libcxx/test/input.output/iostream.format/ext.manip/get_time.pass.cpp b/libcxx/test/input.output/iostream.format/ext.manip/get_time.pass.cpp
index 686655245d5..17ff642dc46 100644
--- a/libcxx/test/input.output/iostream.format/ext.manip/get_time.pass.cpp
+++ b/libcxx/test/input.output/iostream.format/ext.manip/get_time.pass.cpp
@@ -43,7 +43,7 @@ int main()
         std::istream is(&sb);
         is.imbue(std::locale(LOCALE_en_US_UTF_8));
         std::tm t = {0};
-        is >> std::get_time(&t, "%c");
+        is >> std::get_time(&t, "%a %b %d %H:%M:%S %Y");
         assert(t.tm_sec == 59);
         assert(t.tm_min == 55);
         assert(t.tm_hour == 23);
@@ -59,7 +59,7 @@ int main()
         std::wistream is(&sb);
         is.imbue(std::locale(LOCALE_en_US_UTF_8));
         std::tm t = {0};
-        is >> std::get_time(&t, L"%c");
+        is >> std::get_time(&t, L"%a %b %d %H:%M:%S %Y");
         assert(t.tm_sec == 59);
         assert(t.tm_min == 55);
         assert(t.tm_hour == 23);
diff --git a/libcxx/test/input.output/iostream.format/ext.manip/put_time.pass.cpp b/libcxx/test/input.output/iostream.format/ext.manip/put_time.pass.cpp
index d64ca07f830..52a98a1b568 100644
--- a/libcxx/test/input.output/iostream.format/ext.manip/put_time.pass.cpp
+++ b/libcxx/test/input.output/iostream.format/ext.manip/put_time.pass.cpp
@@ -62,7 +62,8 @@ int main()
         t.tm_mon = 11;
         t.tm_year = 161;
         t.tm_wday = 6;
-        os << std::put_time(&t, "%c");
+        t.tm_isdst = 0;
+        os << std::put_time(&t, "%a %b %d %H:%M:%S %Y");
         assert(sb.str() == "Sat Dec 31 23:55:59 2061");
     }
     {
@@ -77,7 +78,7 @@ int main()
         t.tm_mon = 11;
         t.tm_year = 161;
         t.tm_wday = 6;
-        os << std::put_time(&t, L"%c");
+        os << std::put_time(&t, L"%a %b %d %H:%M:%S %Y");
         assert(sb.str() == L"Sat Dec 31 23:55:59 2061");
     }
 }