diff --git a/src/plugins/clangtools/clangtoolsunittests.cpp b/src/plugins/clangtools/clangtoolsunittests.cpp
index 512e6e71355..9d416f07cc1 100644
--- a/src/plugins/clangtools/clangtoolsunittests.cpp
+++ b/src/plugins/clangtools/clangtoolsunittests.cpp
@@ -128,7 +128,7 @@ void ClangToolsUnitTests::testProject()
     QVERIFY(waitForFinishedTool.wait(m_timeout));
 
     // Check for errors
-    const QString errorText = waitForFinishedTool.takeFirst().first().toString();
+    const QString errorText = waitForFinishedTool.takeFirst().constFirst().toString();
     const bool finishedSuccessfully = errorText.isEmpty();
     if (!finishedSuccessfully)
         qWarning("Error: %s", qPrintable(errorText));
diff --git a/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp b/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp
index 03f5ecb51b1..4e31bad6b36 100644
--- a/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp
@@ -245,7 +245,7 @@ static FilePath qmakeFromCMakeCache(const CMakeConfig &config)
     if (!qmakeLocationTxt.open(QIODevice::ReadOnly)) {
         return FilePath();
     }
-    FilePath qmakeLocation = FilePath::fromUtf8(qmakeLocationTxt.readLine().data());
+    FilePath qmakeLocation = FilePath::fromUtf8(qmakeLocationTxt.readLine().constData());
     qCDebug(cmInputLog) << "qmake location: " << qmakeLocation.toUserOutput();
 
     return qmakeLocation;
diff --git a/src/plugins/projectexplorer/outputparser_test.cpp b/src/plugins/projectexplorer/outputparser_test.cpp
index d1d25a3c67b..a70a33a8d88 100644
--- a/src/plugins/projectexplorer/outputparser_test.cpp
+++ b/src/plugins/projectexplorer/outputparser_test.cpp
@@ -62,7 +62,7 @@ void OutputParserTester::testParsing(const QString &lines,
 {
     const auto terminator = new TestTerminator(this);
     if (!lineParsers().isEmpty())
-        terminator->setRedirectionDetector(lineParsers().last());
+        terminator->setRedirectionDetector(lineParsers().constLast());
     addLineParser(terminator);
     reset();
 
@@ -113,7 +113,7 @@ TestTerminator::TestTerminator(OutputParserTester *t) :
     m_tester(t)
 {
     if (!t->lineParsers().isEmpty()) {
-        for (const Utils::FilePath &searchDir : t->lineParsers().first()->searchDirectories())
+        for (const Utils::FilePath &searchDir : t->lineParsers().constFirst()->searchDirectories())
             addSearchDir(searchDir);
     }
 }