diff --git a/tests/auto/network/access/qdecompresshelper/tst_qdecompresshelper.cpp b/tests/auto/network/access/qdecompresshelper/tst_qdecompresshelper.cpp
index 43248a99dc..41f435a076 100644
--- a/tests/auto/network/access/qdecompresshelper/tst_qdecompresshelper.cpp
+++ b/tests/auto/network/access/qdecompresshelper/tst_qdecompresshelper.cpp
@@ -319,6 +319,9 @@ void tst_QDecompressHelper::countAheadPartialRead()
 
 void tst_QDecompressHelper::decompressBigData_data()
 {
+#if defined(QT_ASAN_ENABLED)
+    QSKIP("Tests are too slow with asan enabled");
+#endif
     QTest::addColumn<QByteArray>("encoding");
     QTest::addColumn<QString>("path");
     QTest::addColumn<qint64>("size");
@@ -420,10 +423,12 @@ void tst_QDecompressHelper::bigZlib()
 {
 #if QT_POINTER_SIZE < 8
     QSKIP("This cannot be tested on 32-bit systems");
+#elif defined(QT_ASAN_ENABLED)
+    QSKIP("Test is too slow with asan enabled");
 #else
-#ifndef QT_NO_EXCEPTIONS
+#  ifndef QT_NO_EXCEPTIONS
     try {
-#endif
+#  endif
     // ZLib uses unsigned integers as their size type internally which creates some special
     // cases in the internal code that should be tested!
     QFile file(":/5GiB.txt.inflate");
@@ -443,11 +448,11 @@ void tst_QDecompressHelper::bigZlib()
     QByteArray output(expected + 42, Qt::Uninitialized);
     const qsizetype size = helper.read(output.data(), output.size());
     QCOMPARE(size, expected);
-#ifndef QT_NO_EXCEPTIONS
+#  ifndef QT_NO_EXCEPTIONS
     } catch (const std::bad_alloc &) {
         QSKIP("Encountered most likely OOM.");
     }
-#endif
+#  endif
 #endif
 }