diff --git a/tests/auto/tools/moc/tst_moc.cpp b/tests/auto/tools/moc/tst_moc.cpp
index e12a1d66e42..cb2ac2d18ac 100644
--- a/tests/auto/tools/moc/tst_moc.cpp
+++ b/tests/auto/tools/moc/tst_moc.cpp
@@ -868,6 +868,14 @@ private:
 
 };
 
+#define VERIFY_NO_ERRORS(proc) do { \
+        auto &&p = proc; \
+        const QByteArray stderr = p.readAllStandardError(); \
+        QVERIFY2(stderr.isEmpty(), stderr.data()); \
+        QCOMPARE(p.exitCode(), 0); \
+    } while (false)
+
+
 void tst_Moc::initTestCase()
 {
     QString binpath = QLibraryInfo::path(QLibraryInfo::BinariesPath);
@@ -882,10 +890,9 @@ void tst_Moc::initTestCase()
     QProcess proc;
     proc.start(qtpaths, QStringList() << "-query" << "QT_INSTALL_HEADERS");
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
+    VERIFY_NO_ERRORS(proc);
     QByteArray output = proc.readAllStandardOutput();
     QVERIFY(!output.isEmpty());
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
     qtIncludePath = QString::fromLocal8Bit(output).trimmed();
     QFileInfo fi(qtIncludePath);
     QVERIFY(fi.exists());
@@ -920,10 +927,9 @@ void tst_Moc::oldStyleCasts()
     QProcess proc;
     proc.start(m_moc, QStringList(m_sourceDirectory + QStringLiteral("/oldstyle-casts.h")));
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
+    VERIFY_NO_ERRORS(proc);
     QByteArray mocOut = proc.readAllStandardOutput();
     QVERIFY(!mocOut.isEmpty());
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
 
     QStringList args;
     args << "-c" << "-x" << "c++" << "-Wold-style-cast" << "-I" << "."
@@ -934,8 +940,7 @@ void tst_Moc::oldStyleCasts()
     proc.closeWriteChannel();
 
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(QString::fromLocal8Bit(proc.readAllStandardError()), QString());
-    QCOMPARE(proc.exitCode(), 0);
+    VERIFY_NO_ERRORS(proc);
 #else
     QSKIP("Only tested on linux/gcc");
 #endif
@@ -992,10 +997,9 @@ void tst_Moc::inputFileNameWithDotsButNoExtension()
     proc.setWorkingDirectory(m_sourceDirectory + QStringLiteral("/task71021"));
     proc.start(m_moc, QStringList("../Header"));
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
+    VERIFY_NO_ERRORS(proc);
     QByteArray mocOut = proc.readAllStandardOutput();
     QVERIFY(!mocOut.isEmpty());
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
 
     QStringList args;
     args << "-c" << "-x" << "c++" << "-I" << ".."
@@ -1006,8 +1010,7 @@ void tst_Moc::inputFileNameWithDotsButNoExtension()
     proc.closeWriteChannel();
 
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(QString::fromLocal8Bit(proc.readAllStandardError()), QString());
-    QCOMPARE(proc.exitCode(), 0);
+    VERIFY_NO_ERRORS(proc);
 #else
     QSKIP("Only tested on linux/gcc");
 #endif
@@ -1284,11 +1287,7 @@ void tst_Moc::ignoreOptionClashes()
     if (!finished)
         qWarning("waitForFinished failed. QProcess error: %d", (int)proc.error());
     QVERIFY(finished);
-    if (proc.exitCode() != 0) {
-        qDebug() << proc.readAllStandardError();
-    }
-    QCOMPARE(proc.exitCode(), 0);
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
+    VERIFY_NO_ERRORS(proc);
     QByteArray mocOut = proc.readAllStandardOutput();
 
     // If -pthread wasn't ignored, it was parsed as a prefix of "thread/", which breaks compilation.
@@ -1302,7 +1301,7 @@ void tst_Moc::ignoreOptionClashes()
     proc.closeWriteChannel();
 
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(QString::fromLocal8Bit(proc.readAllStandardError()), QString());
+    VERIFY_NO_ERRORS(proc);
 #else
     QSKIP("Only tested on linux/gcc");
 #endif
@@ -1407,11 +1406,7 @@ void tst_Moc::frameworkSearchPath()
     if (!finished)
         qWarning("waitForFinished failed. QProcess error: %d", (int)proc.error());
     QVERIFY(finished);
-    if (proc.exitCode() != 0) {
-        qDebug() << proc.readAllStandardError();
-    }
-    QCOMPARE(proc.exitCode(), 0);
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
+    VERIFY_NO_ERRORS(proc);
 #else
     QSKIP("Only tested/relevant on unixy platforms");
 #endif
@@ -1443,11 +1438,9 @@ void tst_Moc::templateGtGt()
     QProcess proc;
     proc.start(m_moc, QStringList(m_sourceDirectory + QStringLiteral("/template-gtgt.h")));
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
+    VERIFY_NO_ERRORS(proc);
     QByteArray mocOut = proc.readAllStandardOutput();
     QVERIFY(!mocOut.isEmpty());
-    QString mocWarning = QString::fromLocal8Bit(proc.readAllStandardError());
-    QVERIFY(mocWarning.isEmpty());
 #else
     QSKIP("Only tested on unix/gcc");
 #endif
@@ -1464,8 +1457,7 @@ void tst_Moc::defineMacroViaCmdline()
 
     proc.start(m_moc, args);
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
+    VERIFY_NO_ERRORS(proc);
     QByteArray mocOut = proc.readAllStandardOutput();
     QVERIFY(!mocOut.isEmpty());
 #else
@@ -1484,8 +1476,7 @@ void tst_Moc::defineMacroViaForcedInclude()
 
     proc.start(m_moc, args);
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
+    VERIFY_NO_ERRORS(proc);
     QByteArray mocOut = proc.readAllStandardOutput();
     QVERIFY(!mocOut.isEmpty());
 #else
@@ -1504,8 +1495,7 @@ void tst_Moc::defineMacroViaForcedIncludeRelative()
 
     proc.start(m_moc, args);
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
+    VERIFY_NO_ERRORS(proc);
     QByteArray mocOut = proc.readAllStandardOutput();
     QVERIFY(!mocOut.isEmpty());
 #else
@@ -1550,8 +1540,7 @@ void tst_Moc::environmentIncludePaths()
     proc.setProcessEnvironment(env);
     proc.start(m_moc, args);
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
+    VERIFY_NO_ERRORS(proc);
     QByteArray mocOut = proc.readAllStandardOutput();
     QVERIFY(!mocOut.isEmpty());
 #else
@@ -2009,11 +1998,10 @@ void tst_Moc::notifyError()
     const QString header = m_sourceDirectory + QStringLiteral("/error-on-wrong-notify.h");
     proc.start(m_moc, QStringList(header));
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
+    VERIFY_NO_ERRORS(proc);
     QCOMPARE(proc.exitStatus(), QProcess::NormalExit);
     QByteArray mocOut = proc.readAllStandardOutput();
     QVERIFY(!mocOut.isEmpty());
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
 
     QStringList args;
     args << "-c" << "-x" << "c++" << "-I" << "."
@@ -3758,10 +3746,9 @@ void tst_Moc::preprocessorOnly()
     QProcess proc;
     proc.start(m_moc, QStringList() << "-E" << m_sourceDirectory + QStringLiteral("/pp-dollar-signs.h"));
     QVERIFY(proc.waitForFinished());
-    QCOMPARE(proc.exitCode(), 0);
+    VERIFY_NO_ERRORS(proc);
     QByteArray mocOut = proc.readAllStandardOutput();
     QVERIFY(!mocOut.isEmpty());
-    QCOMPARE(proc.readAllStandardError(), QByteArray());
 
     QVERIFY(mocOut.contains("$$ = parser->createFoo()"));
 #else