diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6483a23..4fb7040 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,11 @@
 cmake_minimum_required(VERSION 3.7.2)
 project(ghcfilesystem)
 
+if(POLICY CMP0110)
+    cmake_policy(PUSH)
+    cmake_policy(SET CMP0110 OLD)
+endif()
+
 include(CMakeDependentOption)
 
 cmake_dependent_option(GHC_FILESYSTEM_BUILD_TESTING
@@ -54,3 +59,6 @@ if(GHC_FILESYSTEM_WITH_INSTALL)
     install(EXPORT ghcFilesystemConfig NAMESPACE ghcFilesystem:: DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/ghcFilesystem)
 endif()
 
+if(POLICY CMP0110)
+    cmake_policy(POP)
+endif()
diff --git a/test/filesystem_test.cpp b/test/filesystem_test.cpp
index 3fac64c..f97f26e 100644
--- a/test/filesystem_test.cpp
+++ b/test/filesystem_test.cpp
@@ -2742,7 +2742,8 @@ TEST_CASE("Windows: Long filename support", "[filesystem][path][fs.path.win.long
 #ifdef GHC_OS_WINDOWS
     TemporaryDirectory t(TempOpt::change_path);
     char c = 'A';
-    fs::path dir = "\\\\?\\" + fs::current_path().u8string();
+    fs::path dir{"\\\\?\\"};
+    dir += fs::current_path().u8string();
     for (; c <= 'Z'; ++c) {
         std::string part = std::string(16, c);
         dir /= part;
@@ -2750,8 +2751,8 @@ TEST_CASE("Windows: Long filename support", "[filesystem][path][fs.path.win.long
         CHECK(fs::exists(dir));
         generateFile(dir / "f0");
         CHECK(fs::exists(dir / "f0"));
-        std::string native = dir.u8string();
-        if (native.substr(0, 4) == "\\\\?\\") {
+        auto native = dir.u8string();
+        if (native.substr(0, 4) == u8"\\\\?\\") {
             break;
         }
     }