diff --git a/tests/time_test.cpp b/tests/time_test.cpp
index fccff67..2b9935a 100644
--- a/tests/time_test.cpp
+++ b/tests/time_test.cpp
@@ -279,6 +279,23 @@
   EXPECT_STREQ("09:41:53", buf);
 }
 
+TEST(time, strptime_l) {
+  setenv("TZ", "UTC", 1);
+
+  struct tm t;
+  char buf[64];
+
+  memset(&t, 0, sizeof(t));
+  strptime_l("11:14", "%R", &t, LC_GLOBAL_LOCALE);
+  strftime_l(buf, sizeof(buf), "%H:%M", &t, LC_GLOBAL_LOCALE);
+  EXPECT_STREQ("11:14", buf);
+
+  memset(&t, 0, sizeof(t));
+  strptime_l("09:41:53", "%T", &t, LC_GLOBAL_LOCALE);
+  strftime_l(buf, sizeof(buf), "%H:%M:%S", &t, LC_GLOBAL_LOCALE);
+  EXPECT_STREQ("09:41:53", buf);
+}
+
 void SetTime(timer_t t, time_t value_s, time_t value_ns, time_t interval_s, time_t interval_ns) {
   itimerspec ts;
   ts.it_value.tv_sec = value_s;
diff --git a/tests/wchar_test.cpp b/tests/wchar_test.cpp
index 6f90c6c..b42e13c 100644
--- a/tests/wchar_test.cpp
+++ b/tests/wchar_test.cpp
@@ -539,7 +539,7 @@
   ASSERT_EQ(EILSEQ, errno);
 }
 
-TEST(wchar, wcsftime) {
+TEST(wchar, wcsftime__wcsftime_l) {
   setenv("TZ", "UTC", 1);
 
   struct tm t;
@@ -552,6 +552,8 @@
 
   EXPECT_EQ(24U, wcsftime(buf, sizeof(buf), L"%c", &t));
   EXPECT_STREQ(L"Sun Mar 10 00:00:00 2100", buf);
+  EXPECT_EQ(24U, wcsftime_l(buf, sizeof(buf), L"%c", &t, LC_GLOBAL_LOCALE));
+  EXPECT_STREQ(L"Sun Mar 10 00:00:00 2100", buf);
 }
 
 TEST(wchar, wmemmove_smoke) {
@@ -878,6 +880,34 @@
   TestWcsToFloatInfNan(wcstold);
 }
 
+TEST(wchar, wcstod_l) {
+  EXPECT_EQ(1.23, wcstod_l(L"1.23", nullptr, LC_GLOBAL_LOCALE));
+}
+
+TEST(wchar, wcstof_l) {
+  EXPECT_EQ(1.23f, wcstof_l(L"1.23", nullptr, LC_GLOBAL_LOCALE));
+}
+
+TEST(wchar, wcstol_l) {
+  EXPECT_EQ(123L, wcstol_l(L"123", nullptr, 10, LC_GLOBAL_LOCALE));
+}
+
+TEST(wchar, wcstold_l) {
+  EXPECT_EQ(1.23L, wcstold_l(L"1.23", nullptr, LC_GLOBAL_LOCALE));
+}
+
+TEST(wchar, wcstoll_l) {
+  EXPECT_EQ(123LL, wcstoll_l(L"123", nullptr, 10, LC_GLOBAL_LOCALE));
+}
+
+TEST(wchar, wcstoul_l) {
+  EXPECT_EQ(123UL, wcstoul_l(L"123", nullptr, 10, LC_GLOBAL_LOCALE));
+}
+
+TEST(wchar, wcstoull_l) {
+  EXPECT_EQ(123ULL, wcstoul_l(L"123", nullptr, 10, LC_GLOBAL_LOCALE));
+}
+
 static void AssertWcwidthRange(wchar_t begin, wchar_t end, int expected) {
   for (wchar_t i = begin; i < end; ++i) {
     EXPECT_EQ(expected, wcwidth(i)) << static_cast<int>(i);