diff -Nru qtdeclarative-opensource-src-5.15.2+dfsg/debian/changelog qtdeclarative-opensource-src-5.15.2+dfsg/debian/changelog
--- qtdeclarative-opensource-src-5.15.2+dfsg/debian/changelog	2021-02-04 17:36:43.000000000 +0000
+++ qtdeclarative-opensource-src-5.15.2+dfsg/debian/changelog	2021-03-19 17:46:16.000000000 +0000
@@ -1,3 +1,11 @@
+qtdeclarative-opensource-src (5.15.2+dfsg-5) unstable; urgency=medium
+
+  * Add a patch to make tst_qmldiskcache::regenerateAfterChange() pass on
+    big endian systems.
+  * Add missing dependencies to qtdeclarative5-dev (closes: #985500).
+
+ -- Dmitry Shachnev <mitya57@debian.org>  Fri, 19 Mar 2021 20:46:16 +0300
+
 qtdeclarative-opensource-src (5.15.2+dfsg-4) unstable; urgency=medium
 
   * Add Conflicts: against the -gles packages, to make that relation mutual.
diff -Nru qtdeclarative-opensource-src-5.15.2+dfsg/debian/control qtdeclarative-opensource-src-5.15.2+dfsg/debian/control
--- qtdeclarative-opensource-src-5.15.2+dfsg/debian/control	2021-02-04 17:36:43.000000000 +0000
+++ qtdeclarative-opensource-src-5.15.2+dfsg/debian/control	2021-03-19 17:46:16.000000000 +0000
@@ -329,6 +329,8 @@
 Architecture: any
 Multi-Arch: same
 Depends: libqt5qml5 (= ${binary:Version}),
+         libqt5qmlmodels5 (= ${binary:Version}),
+         libqt5qmlworkerscript5 (= ${binary:Version}),
          libqt5quick5 (= ${binary:Version}) | libqt5quick5-gles (>= 5.15),
          libqt5quickparticles5 (= ${binary:Version}) | libqt5quickparticles5-gles (>= 5.15),
          libqt5quickshapes5 (= ${binary:Version}),
diff -Nru qtdeclarative-opensource-src-5.15.2+dfsg/debian/patches/series qtdeclarative-opensource-src-5.15.2+dfsg/debian/patches/series
--- qtdeclarative-opensource-src-5.15.2+dfsg/debian/patches/series	2021-02-04 17:36:43.000000000 +0000
+++ qtdeclarative-opensource-src-5.15.2+dfsg/debian/patches/series	2021-03-19 17:46:16.000000000 +0000
@@ -2,6 +2,7 @@
 qmltime-tool.patch
 fix_qml_property_cache_leaks.patch
 gcc_11.patch
+tst_qmldiskcache_big_endian.patch
 
 # Debian patches
 disableopengltests.patch
diff -Nru qtdeclarative-opensource-src-5.15.2+dfsg/debian/patches/tst_qmldiskcache_big_endian.patch qtdeclarative-opensource-src-5.15.2+dfsg/debian/patches/tst_qmldiskcache_big_endian.patch
--- qtdeclarative-opensource-src-5.15.2+dfsg/debian/patches/tst_qmldiskcache_big_endian.patch	1970-01-01 00:00:00.000000000 +0000
+++ qtdeclarative-opensource-src-5.15.2+dfsg/debian/patches/tst_qmldiskcache_big_endian.patch	2021-03-19 17:46:16.000000000 +0000
@@ -0,0 +1,18 @@
+Description: make tst_qmldiskcache::regenerateAfterChange() pass on big endian systems
+Origin: upstream, https://code.qt.io/cgit/qt/qtdeclarative.git/commit/?id=dab0d62b655ce9a4
+Last-Update: 2021-02-11
+
+--- a/tests/auto/qml/qmldiskcache/tst_qmldiskcache.cpp
++++ b/tests/auto/qml/qmldiskcache/tst_qmldiskcache.cpp
+@@ -332,9 +332,8 @@ void tst_qmldiskcache::regenerateAfterCh
+         QCOMPARE(quint32(obj->nBindings), quint32(2));
+         QCOMPARE(quint32(obj->bindingTable()->type), quint32(QV4::CompiledData::Binding::Type_Number));
+ 
+-        QCOMPARE(reinterpret_cast<const QV4::Value *>(testUnit->constants())
+-                         [obj->bindingTable()->value.constantValueIndex].doubleValue(),
+-                 double(42));
++        const QV4::Value value(testUnit->constants()[obj->bindingTable()->value.constantValueIndex]);
++        QCOMPARE(value.doubleValue(), double(42));
+ 
+         QCOMPARE(quint32(testUnit->functionTableSize), quint32(1));
+ 
diff -Nru qtdeclarative-opensource-src-5.15.2+dfsg/debian/rules qtdeclarative-opensource-src-5.15.2+dfsg/debian/rules
--- qtdeclarative-opensource-src-5.15.2+dfsg/debian/rules	2021-02-04 17:36:43.000000000 +0000
+++ qtdeclarative-opensource-src-5.15.2+dfsg/debian/rules	2021-03-19 17:46:16.000000000 +0000
@@ -65,7 +65,7 @@
 ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
 	$(MAKE) install INSTALL_ROOT=$(CURDIR)/test_root
 	mkdir -p $(CURDIR)/.local/share/QtProject/tst_qqmlengine
-	# - hppa: QML engine is broken, bug missing
+	# - hppa: QML engine is broken, see bug #973659
 	# - ia64: QML engine is broken, see bug #929682
 	# - mips*: Some tests are failing because of bug #868745
 	# - powerpc, ppc64, s390x: item-grabber test fails on big endian, see https://bugreports.qt.io/browse/QTBUG-56806