diff --git a/tests/shared/filesystem.h b/tests/shared/filesystem.h
index b59baf69b6..03d5cd56e6 100644
--- a/tests/shared/filesystem.h
+++ b/tests/shared/filesystem.h
@@ -25,9 +25,11 @@
 #ifndef SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE // MinGW
 #define SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE (0x2)
 #endif
+QT_BEGIN_NAMESPACE
 namespace QTest {
     static QString uncServerName() { return qgetenv("COMPUTERNAME"); }
 }
+QT_END_NAMESPACE
 #endif
 
 // QTemporaryDir-based helper class for creating file-system hierarchies and cleaning up.