diff --git a/src/corelib/itemmodels/qidentityproxymodel.cpp b/src/corelib/itemmodels/qidentityproxymodel.cpp
index 069878e1123..1a97dd5b05d 100644
--- a/src/corelib/itemmodels/qidentityproxymodel.cpp
+++ b/src/corelib/itemmodels/qidentityproxymodel.cpp
@@ -291,10 +291,13 @@ QVariant QIdentityProxyModel::headerData(int section, Qt::Orientation orientatio
  */
 void QIdentityProxyModel::setSourceModel(QAbstractItemModel* newSourceModel)
 {
-    beginResetModel();
-
     Q_D(QIdentityProxyModel);
 
+    if (newSourceModel == d->model)
+        return;
+
+    beginResetModel();
+
     // Call QObject::disconnect() unconditionally, if there is an existing source
     // model, it's disconnected, and if there isn't, then calling disconnect() on
     // a default-constructed Connection does nothing
diff --git a/tests/auto/corelib/itemmodels/qidentityproxymodel/tst_qidentityproxymodel.cpp b/tests/auto/corelib/itemmodels/qidentityproxymodel/tst_qidentityproxymodel.cpp
index 72f71d3d046..c99242c927b 100644
--- a/tests/auto/corelib/itemmodels/qidentityproxymodel/tst_qidentityproxymodel.cpp
+++ b/tests/auto/corelib/itemmodels/qidentityproxymodel/tst_qidentityproxymodel.cpp
@@ -357,10 +357,19 @@ void tst_QIdentityProxyModel::reset()
         resetCommand.doCommand();
     }
 
-    QVERIFY(modelBeforeSpy.size() == 1 && 1 == proxyBeforeSpy.size());
-    QVERIFY(modelAfterSpy.size() == 1 && 1 == proxyAfterSpy.size());
+    QCOMPARE(modelBeforeSpy.size(), 1);
+    QCOMPARE(modelAfterSpy.size(), 1);
+    QCOMPARE(proxyBeforeSpy.size(), 1);
+    QCOMPARE(proxyAfterSpy.size(), 1);
 
     verifyIdentity(&model);
+
+    // setSourceModel again shouldn't emit reset
+    m_proxy->setSourceModel(&model);
+
+    QCOMPARE(proxyBeforeSpy.size(), 1);
+    QCOMPARE(proxyAfterSpy.size(), 1);
+
     m_proxy->setSourceModel(0);
 }