diff --git a/poky/meta/lib/oeqa/selftest/cases/bblayers.py b/poky/meta/lib/oeqa/selftest/cases/bblayers.py
index 954488d..f131d98 100644
--- a/poky/meta/lib/oeqa/selftest/cases/bblayers.py
+++ b/poky/meta/lib/oeqa/selftest/cases/bblayers.py
@@ -14,21 +14,21 @@
 
     def test_bitbakelayers_showcrossdepends(self):
         result = runCmd('bitbake-layers show-cross-depends')
-        self.assertTrue('aspell' in result.output, msg = "No dependencies were shown. bitbake-layers show-cross-depends output: %s" % result.output)
+        self.assertIn('aspell', result.output)
 
     def test_bitbakelayers_showlayers(self):
         result = runCmd('bitbake-layers show-layers')
-        self.assertTrue('meta-selftest' in result.output, msg = "No layers were shown. bitbake-layers show-layers output: %s" % result.output)
+        self.assertIn('meta-selftest', result.output)
 
     def test_bitbakelayers_showappends(self):
         recipe = "xcursor-transparent-theme"
         bb_file = self.get_recipe_basename(recipe)
         result = runCmd('bitbake-layers show-appends')
-        self.assertTrue(bb_file in result.output, msg="%s file was not recognised. bitbake-layers show-appends output: %s" % (bb_file, result.output))
+        self.assertIn(bb_file, result.output)
 
     def test_bitbakelayers_showoverlayed(self):
         result = runCmd('bitbake-layers show-overlayed')
-        self.assertTrue('aspell' in result.output, msg="aspell overlayed recipe was not recognised bitbake-layers show-overlayed %s" % result.output)
+        self.assertIn('aspell', result.output)
 
     def test_bitbakelayers_flatten(self):
         recipe = "xcursor-transparent-theme"
diff --git a/poky/meta/lib/oeqa/selftest/cases/bbtests.py b/poky/meta/lib/oeqa/selftest/cases/bbtests.py
index 9461c7e..dc423ec 100644
--- a/poky/meta/lib/oeqa/selftest/cases/bbtests.py
+++ b/poky/meta/lib/oeqa/selftest/cases/bbtests.py
@@ -44,7 +44,7 @@
         find_build_completed = re.search(r"Tasks Summary:.*(\n.*)*NOTE: Test for bb\.event\.BuildCompleted", result.output)
         self.assertTrue(find_build_started, msg = "Match failed in:\n%s"  % result.output)
         self.assertTrue(find_build_completed, msg = "Match failed in:\n%s" % result.output)
-        self.assertFalse('Test for bb.event.InvalidEvent' in result.output, msg = "\"Test for bb.event.InvalidEvent\" message found during bitbake process. bitbake output: %s" % result.output)
+        self.assertNotIn('Test for bb.event.InvalidEvent', result.output)
 
     def test_local_sstate(self):
         bitbake('m4-native')
@@ -59,7 +59,7 @@
 
     def test_bitbake_invalid_target(self):
         result = bitbake('asdf', ignore_status=True)
-        self.assertTrue("ERROR: Nothing PROVIDES 'asdf'" in result.output, msg = "Though no 'asdf' target exists, bitbake didn't output any err. message. bitbake output: %s" % result.output)
+        self.assertIn("ERROR: Nothing PROVIDES 'asdf'", result.output)
 
     def test_warnings_errors(self):
         result = bitbake('-b asdf', ignore_status=True)
@@ -123,7 +123,7 @@
         for f in ['pn-buildlist', 'task-depends.dot']:
             self.addCleanup(os.remove, f)
         self.assertTrue('Task dependencies saved to \'task-depends.dot\'' in result.output, msg = "No task dependency \"task-depends.dot\" file was generated for the given task target. bitbake output: %s" % result.output)
-        self.assertTrue(recipe in ftools.read_file(os.path.join(self.builddir, 'task-depends.dot')), msg = "No \"%s\" dependency found in task-depends.dot file." % recipe)
+        self.assertIn(recipe, ftools.read_file(os.path.join(self.builddir, 'task-depends.dot')))
 
     def test_image_manifest(self):
         bitbake('core-image-minimal')
@@ -147,8 +147,7 @@
         bitbake('-ccleanall man-db')
         self.delete_recipeinc('man-db')
         self.assertEqual(result.status, 1, msg="Command succeded when it should have failed. bitbake output: %s" % result.output)
-        self.assertTrue('Fetcher failure: Unable to find file file://invalid anywhere. The paths that were searched were:' in result.output, msg = "\"invalid\" file \
-doesn't exist, yet no error message encountered. bitbake output: %s" % result.output)
+        self.assertIn('Fetcher failure: Unable to find file file://invalid anywhere. The paths that were searched were:', result.output)
         line = self.getline(result, 'Fetcher failure for URL: \'file://invalid\'. Unable to fetch URL from any source.')
         self.assertTrue(line and line.startswith("ERROR:"), msg = "\"invalid\" file \
 doesn't exist, yet fetcher didn't report any error. bitbake output: %s" % result.output)
@@ -173,7 +172,7 @@
     def test_environment(self):
         self.write_config("TEST_ENV=\"localconf\"")
         result = runCmd('bitbake -e | grep TEST_ENV=')
-        self.assertTrue('localconf' in result.output, msg = "bitbake didn't report any value for TEST_ENV variable. To test, run 'bitbake -e | grep TEST_ENV='")
+        self.assertIn('localconf', result.output)
 
     def test_dry_run(self):
         result = runCmd('bitbake -n m4-native')
@@ -193,10 +192,10 @@
         self.track_for_cleanup(preconf)
         ftools.write_file(preconf ,"TEST_PREFILE=\"prefile\"")
         result = runCmd('bitbake -r conf/prefile.conf -e | grep TEST_PREFILE=')
-        self.assertTrue('prefile' in result.output, "Preconfigure file \"prefile.conf\"was not taken into consideration. ")
+        self.assertIn('prefile', result.output)
         self.write_config("TEST_PREFILE=\"localconf\"")
         result = runCmd('bitbake -r conf/prefile.conf -e | grep TEST_PREFILE=')
-        self.assertTrue('localconf' in result.output, "Preconfigure file \"prefile.conf\"was not taken into consideration.")
+        self.assertIn('localconf', result.output)
 
     def test_postfile(self):
         postconf = os.path.join(self.builddir, 'conf/postfile.conf')
@@ -204,7 +203,7 @@
         ftools.write_file(postconf , "TEST_POSTFILE=\"postfile\"")
         self.write_config("TEST_POSTFILE=\"localconf\"")
         result = runCmd('bitbake -R conf/postfile.conf -e | grep TEST_POSTFILE=')
-        self.assertTrue('postfile' in result.output, "Postconfigure file \"postfile.conf\"was not taken into consideration.")
+        self.assertIn('postfile', result.output)
 
     def test_checkuri(self):
         result = runCmd('bitbake -c checkuri m4')
diff --git a/poky/meta/lib/oeqa/selftest/cases/imagefeatures.py b/poky/meta/lib/oeqa/selftest/cases/imagefeatures.py
index cf2a42a..ef2eefa 100644
--- a/poky/meta/lib/oeqa/selftest/cases/imagefeatures.py
+++ b/poky/meta/lib/oeqa/selftest/cases/imagefeatures.py
@@ -124,7 +124,7 @@
 
         # check if result image is sparse
         image_stat = os.stat(image_path)
-        self.assertTrue(image_stat.st_size > image_stat.st_blocks * 512)
+        self.assertGreater(image_stat.st_size, image_stat.st_blocks * 512)
 
         # check if the resulting gzip is valid
         self.assertTrue(runCmd('gzip -t %s' % gzip_path))
diff --git a/poky/meta/lib/oeqa/selftest/cases/incompatible_lic.py b/poky/meta/lib/oeqa/selftest/cases/incompatible_lic.py
index 424a9e6..904b5b4 100644
--- a/poky/meta/lib/oeqa/selftest/cases/incompatible_lic.py
+++ b/poky/meta/lib/oeqa/selftest/cases/incompatible_lic.py
@@ -73,3 +73,21 @@
 
         bitbake('core-image-minimal')
 
+class NoGPL3InImagesTests(OESelftestTestCase):
+    def test_core_image_minimal(self):
+        self.write_config("""
+INCOMPATIBLE_LICENSE_pn-core-image-minimal = "GPL-3.0 LGPL-3.0"
+""")
+        bitbake('core-image-minimal')
+
+    def test_core_image_full_cmdline(self):
+        self.write_config("""
+INHERIT += "testimage"\n
+INCOMPATIBLE_LICENSE_pn-core-image-full-cmdline = "GPL-3.0 LGPL-3.0"\n
+RDEPENDS_packagegroup-core-full-cmdline-utils_remove = "bash bc coreutils cpio ed findutils gawk grep mc mc-fish mc-helpers mc-helpers-perl sed tar time"\n
+RDEPENDS_packagegroup-core-full-cmdline-dev-utils_remove = "diffutils m4 make patch"\n
+RDEPENDS_packagegroup-core-full-cmdline-multiuser_remove = "gzip"\n
+""")
+        bitbake('core-image-full-cmdline')
+        bitbake('-c testimage core-image-full-cmdline')
+
diff --git a/poky/meta/lib/oeqa/selftest/cases/oescripts.py b/poky/meta/lib/oeqa/selftest/cases/oescripts.py
index c169885..80d8b2c 100644
--- a/poky/meta/lib/oeqa/selftest/cases/oescripts.py
+++ b/poky/meta/lib/oeqa/selftest/cases/oescripts.py
@@ -121,3 +121,9 @@
         if dash is None:
             self.skipTest("No \"dash\" found on test system.")
         self.run_oegitproxy(custom_shell=dash)
+
+class OeRunNativeTest(OESelftestTestCase):
+    def test_oe_run_native(self):
+        bitbake("qemu-helper-native -c addto_recipe_sysroot")
+        result = runCmd("oe-run-native qemu-helper-native tunctl -h")
+        self.assertIn("Delete: tunctl -d device-name [-f tun-clone-device]", result.output)
diff --git a/poky/meta/lib/oeqa/selftest/cases/recipetool.py b/poky/meta/lib/oeqa/selftest/cases/recipetool.py
index 1c701a4..c1562c6 100644
--- a/poky/meta/lib/oeqa/selftest/cases/recipetool.py
+++ b/poky/meta/lib/oeqa/selftest/cases/recipetool.py
@@ -685,7 +685,9 @@
 
         self._test_appendsrcfile(testrecipe, filepath, srcdir=subdir)
         bitbake('%s:do_unpack' % testrecipe)
-        self.assertEqual(open(self.testfile, 'r').read(), open(os.path.join(srcdir, filepath), 'r').read())
+        with open(self.testfile, 'r') as testfile:
+            with open(os.path.join(srcdir, filepath), 'r') as makefilein:
+                self.assertEqual(testfile.read(), makefilein.read())
 
     def test_recipetool_appendsrcfiles_basic(self, destdir=None):
         newfiles = [self.testfile]
diff --git a/poky/meta/lib/oeqa/selftest/cases/runtime_test.py b/poky/meta/lib/oeqa/selftest/cases/runtime_test.py
index 3f212bd..7d3922c 100644
--- a/poky/meta/lib/oeqa/selftest/cases/runtime_test.py
+++ b/poky/meta/lib/oeqa/selftest/cases/runtime_test.py
@@ -179,6 +179,8 @@
         distro = oe.lsb.distro_identifier()
         if distro and distro == 'debian-8':
             self.skipTest('virgl isn\'t working with Debian 8')
+        if distro and distro == 'centos-7':
+            self.skipTest('virgl isn\'t working with Centos 7')
 
         qemu_packageconfig = get_bb_var('PACKAGECONFIG', 'qemu-system-native')
         features = 'INHERIT += "testimage"\n'