diff --git a/src/plugins/imageformats/ico/qicohandler.cpp b/src/plugins/imageformats/ico/qicohandler.cpp
index e58dde4e974..18b39766f5b 100644
--- a/src/plugins/imageformats/ico/qicohandler.cpp
+++ b/src/plugins/imageformats/ico/qicohandler.cpp
@@ -735,6 +735,8 @@ bool QtIcoHandler::supportsOption(ImageOption option) const
  */
 bool QtIcoHandler::canRead() const
 {
+    if (knownCanRead)
+        return true;
     bool bCanRead = false;
     QIODevice *device = QImageIOHandler::device();
     if (device) {
@@ -744,6 +746,7 @@ bool QtIcoHandler::canRead() const
     } else {
         qCWarning(lcIco, "QtIcoHandler::canRead() called with no device");
     }
+    knownCanRead = bCanRead;
     return bCanRead;
 }
 
diff --git a/src/plugins/imageformats/ico/qicohandler.h b/src/plugins/imageformats/ico/qicohandler.h
index 0fe251ab60b..61c3eea4651 100644
--- a/src/plugins/imageformats/ico/qicohandler.h
+++ b/src/plugins/imageformats/ico/qicohandler.h
@@ -30,7 +30,7 @@ public:
 private:
     int m_currentIconIndex;
     ICOReader *m_pICOReader;
-
+    mutable bool knownCanRead = false;
 };
 
 QT_END_NAMESPACE
diff --git a/tests/auto/gui/image/qmovie/tst_qmovie.cpp b/tests/auto/gui/image/qmovie/tst_qmovie.cpp
index 4a95493b45a..fc810632813 100644
--- a/tests/auto/gui/image/qmovie/tst_qmovie.cpp
+++ b/tests/auto/gui/image/qmovie/tst_qmovie.cpp
@@ -272,8 +272,8 @@ void tst_QMovie::multiFrameImage()
     QMovie movie(QFINDTESTDATA("multiframe/Obj_N2_Internal_Mem.ico"));
     const int expectedFrameCount = 9;
 
-    QVERIFY(movie.isValid());
     QCOMPARE(movie.frameCount(), expectedFrameCount);
+    QVERIFY(movie.isValid());
     movie.setSpeed(1000); // speed up the test: play at 10 FPS (1000% of normal)
     QElapsedTimer playTimer;
     QSignalSpy frameChangedSpy(&movie, &QMovie::frameChanged);