diff --git a/src/plugins/qttest/addmanualtestdlg.h b/src/plugins/qttest/addmanualtestdlg.h
index 7056d618e3650168568882e6ffb7513fc539e779..ef6de9a49b813c3157ba90f0c71dcbcd241c6a7b 100644
--- a/src/plugins/qttest/addmanualtestdlg.h
+++ b/src/plugins/qttest/addmanualtestdlg.h
@@ -35,9 +35,11 @@
 
 #include <QDialog>
 
+QT_BEGIN_NAMESPACE
 namespace Ui {
     class AddManualTestDlg;
 }
+QT_END_NAMESPACE
 
 class AddManualTestDlg : public QDialog
 {
diff --git a/src/plugins/qttest/newtestcasedlg.h b/src/plugins/qttest/newtestcasedlg.h
index 357c6536e8ce53c0fb0898fa8b38f5615a2828b7..05d4110fe89bc29d2073b542a9e78d7df90b954f 100644
--- a/src/plugins/qttest/newtestcasedlg.h
+++ b/src/plugins/qttest/newtestcasedlg.h
@@ -36,9 +36,11 @@
 #include "testgenerator.h"
 #include <QDialog>
 
+QT_BEGIN_NAMESPACE
 namespace Ui {
-    class NewTestCaseDlg;
+class NewTestCaseDlg;
 }
+QT_END_NAMESPACE
 
 class NewTestCaseDlg : public QDialog
 {
diff --git a/src/plugins/qttest/resultsview.h b/src/plugins/qttest/resultsview.h
index 5cc6c89c651b46d0cad3808e8d552191a35f6538..dc03a05ae5276724ccfbb5aa0d03ae93ad49ed7d 100644
--- a/src/plugins/qttest/resultsview.h
+++ b/src/plugins/qttest/resultsview.h
@@ -43,7 +43,9 @@
 
 class ResultsView;
 class TestResultsWindow;
+QT_BEGIN_NAMESPACE
 class QToolButton;
+QT_END_NAMESPACE
 
 ResultsView *testResultsPane();