9 files changed, 55 insertions, 3 deletions
diff --git a/tests/auto/auto.pro b/tests/auto/auto.pro
index deda6cb..bf0f8e5 100644
--- a/tests/auto/auto.pro
+++ b/tests/auto/auto.pro
@@ -5,6 +5,6 @@ SUBDIRS = \
     dds \
     icns \
     jp2 \
-    webp
-
-contains(QT_CONFIG, system-zlib): SUBDIRS += mng tiff
+    webp \
+    mng \
+    tiff
diff --git a/tests/auto/dds/tst_qdds.cpp b/tests/auto/dds/tst_qdds.cpp
index ec731c2..ca66ec6 100644
--- a/tests/auto/dds/tst_qdds.cpp
+++ b/tests/auto/dds/tst_qdds.cpp
@@ -40,6 +40,7 @@ class tst_qdds: public QObject
     Q_OBJECT
 
 private slots:
+    void initTestCase();
     void readImage_data();
     void readImage();
     void testMipmaps_data();
@@ -48,6 +49,12 @@ private slots:
     void testWriteImage();
 };
 
+void tst_qdds::initTestCase()
+{
+    if (!QImageReader::supportedImageFormats().contains("dds"))
+        QSKIP("The image format handler is not installed.");
+}
+
 void tst_qdds::readImage_data()
 {
     QTest::addColumn<QString>("fileName");
diff --git a/tests/auto/icns/tst_qicns.cpp b/tests/auto/icns/tst_qicns.cpp
index 8385ad1..969a0ca 100644
--- a/tests/auto/icns/tst_qicns.cpp
+++ b/tests/auto/icns/tst_qicns.cpp
@@ -40,12 +40,19 @@ class tst_qicns: public QObject
     Q_OBJECT
 
 private slots:
+    void initTestCase();
     void readIcons_data();
     void readIcons();
     void writeIcons_data();
     void writeIcons();
 };
 
+void tst_qicns::initTestCase()
+{
+    if (!QImageReader::supportedImageFormats().contains("icns"))
+        QSKIP("The image format handler is not installed.");
+}
+
 void tst_qicns::readIcons_data()
 {
     QTest::addColumn<QString>("fileName");
diff --git a/tests/auto/jp2/tst_qjp2.cpp b/tests/auto/jp2/tst_qjp2.cpp
index 3400ece..5045eee 100644
--- a/tests/auto/jp2/tst_qjp2.cpp
+++ b/tests/auto/jp2/tst_qjp2.cpp
@@ -40,10 +40,17 @@ class tst_qjp2: public QObject
     Q_OBJECT
 
 private slots:
+    void initTestCase();
     void readImage_data();
     void readImage();
 };
 
+void tst_qjp2::initTestCase()
+{
+    if (!QImageReader::supportedImageFormats().contains("jp2"))
+        QSKIP("The image format handler is not installed.");
+}
+
 void tst_qjp2::readImage_data()
 {
     QTest::addColumn<QString>("fileName");
diff --git a/tests/auto/mng/tst_qmng.cpp b/tests/auto/mng/tst_qmng.cpp
index 7e37d97..b82ece1 100644
--- a/tests/auto/mng/tst_qmng.cpp
+++ b/tests/auto/mng/tst_qmng.cpp
@@ -39,12 +39,19 @@ class tst_qmng: public QObject
     Q_OBJECT
 
 private slots:
+    void initTestCase();
     void readImage_data();
     void readImage();
     void readCorruptImage_data();
     void readCorruptImage();
 };
 
+void tst_qmng::initTestCase()
+{
+    if (!QImageReader::supportedImageFormats().contains("mng"))
+        QSKIP("The image format handler is not installed.");
+}
+
 void tst_qmng::readImage_data()
 {
     QTest::addColumn<QString>("fileName");
diff --git a/tests/auto/tga/tst_qtga.cpp b/tests/auto/tga/tst_qtga.cpp
index 6569077..0001383 100644
--- a/tests/auto/tga/tst_qtga.cpp
+++ b/tests/auto/tga/tst_qtga.cpp
@@ -39,10 +39,17 @@ class tst_qtga: public QObject
     Q_OBJECT
 
 private slots:
+    void initTestCase();
     void readImage_data();
     void readImage();
 };
 
+void tst_qtga::initTestCase()
+{
+    if (!QImageReader::supportedImageFormats().contains("tga"))
+        QSKIP("The image format handler is not installed.");
+}
+
 void tst_qtga::readImage_data()
 {
     QTest::addColumn<QString>("fileName");
diff --git a/tests/auto/tiff/tst_qtiff.cpp b/tests/auto/tiff/tst_qtiff.cpp
index 70837a5..a77a735 100644
--- a/tests/auto/tiff/tst_qtiff.cpp
+++ b/tests/auto/tiff/tst_qtiff.cpp
@@ -89,6 +89,9 @@ private:
 
 void tst_qtiff::initTestCase()
 {
+    if (!QImageReader::supportedImageFormats().contains("tiff"))
+        QSKIP("The image format handler is not installed.");
+
     prefix = ":/tiff/";
 }
 
diff --git a/tests/auto/wbmp/tst_qwbmp.cpp b/tests/auto/wbmp/tst_qwbmp.cpp
index 344cd3d..a315fc4 100644
--- a/tests/auto/wbmp/tst_qwbmp.cpp
+++ b/tests/auto/wbmp/tst_qwbmp.cpp
@@ -39,10 +39,17 @@ class tst_qwbmp: public QObject
     Q_OBJECT
 
 private slots:
+    void initTestCase();
     void readImage_data();
     void readImage();
 };
 
+void tst_qwbmp::initTestCase()
+{
+    if (!QImageReader::supportedImageFormats().contains("wbmp"))
+        QSKIP("The image format handler is not installed.");
+}
+
 void tst_qwbmp::readImage_data()
 {
     QTest::addColumn<QString>("fileName");
diff --git a/tests/auto/webp/tst_qwebp.cpp b/tests/auto/webp/tst_qwebp.cpp
index 2708004..5cbfc0c 100644
--- a/tests/auto/webp/tst_qwebp.cpp
+++ b/tests/auto/webp/tst_qwebp.cpp
@@ -39,12 +39,19 @@ class tst_qwebp : public QObject
     Q_OBJECT
 
 private slots:
+    void initTestCase();
     void readImage_data();
     void readImage();
     void writeImage_data();
     void writeImage();
 };
 
+void tst_qwebp::initTestCase()
+{
+    if (!QImageReader::supportedImageFormats().contains("webp"))
+        QSKIP("The image format handler is not installed.");
+}
+
 void tst_qwebp::readImage_data()
 {
     QTest::addColumn<QString>("fileName");