Index: ps/trunk/source/ps/tests/test_fmt.h
===================================================================
--- ps/trunk/source/ps/tests/test_fmt.h	(revision 24299)
+++ ps/trunk/source/ps/tests/test_fmt.h	(revision 24300)
@@ -1,63 +1,63 @@
 /* Copyright (C) 2020 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 2 of the License, or
  * (at your option) any later version.
  *
  * 0 A.D. is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <fmt/printf.h>
 
 #include "lib/self_test.h"
 
 class TestFmt : public CxxTest::TestSuite
 {
 public:
 	void test_basic()
 	{
 		// Make test behave independent of current host locale
-		char* old = setlocale(LC_ALL, "en_US.UTF-8");
+		char* old = setlocale(LC_ALL, "C");
 
 		TS_ASSERT_EQUALS(fmt::sprintf("abc"), "abc");
 
 		TS_ASSERT_EQUALS(fmt::sprintf("%d", 123), "123");
 		TS_ASSERT_EQUALS(fmt::sprintf("%d", (int64_t)123), "123");
 		TS_ASSERT_EQUALS(fmt::sprintf("%i", 123), "123");
 
 		TS_ASSERT_EQUALS(fmt::sprintf("%04x", 123), "007b");
 		TS_ASSERT_EQUALS(fmt::sprintf("%04X", 123), "007B");
 
 		TS_ASSERT_EQUALS(fmt::sprintf("%f", 0.5f), "0.500000");
 		TS_ASSERT_EQUALS(fmt::sprintf("%.1f", 0.1111f), "0.1");
 
 		TS_ASSERT_EQUALS(fmt::sprintf("%d", 0x100000001ULL), "4294967297");
 		if (sizeof(long) == sizeof(int32_t))
 		{
 			TS_ASSERT_EQUALS(fmt::sprintf("%ld", 0x100000001ULL), "1");
 		}
 		else
 		{
 			TS_ASSERT_EQUALS(fmt::sprintf("%ld", 0x100000001ULL), "4294967297");
 		}
 		TS_ASSERT_EQUALS(fmt::sprintf("%lld", 0x100000001ULL), "4294967297");
 
 		TS_ASSERT_EQUALS(fmt::sprintf("T%sT", "abc"), "TabcT");
 		TS_ASSERT_EQUALS(fmt::sprintf("T%sT", std::string("abc")), "TabcT");
 		TS_ASSERT_EQUALS(fmt::sprintf("T%sT", CStr("abc")), "TabcT");
 
 		TS_ASSERT_EQUALS(fmt::sprintf("T%sT", (const char*)NULL), "T(null)T");
 
 		TS_ASSERT_EQUALS(fmt::sprintf("T%pT", (void*)0x1234), "T0x1234T");
 
 		setlocale(LC_ALL, old);
 	}
 };