diff --git a/poky/bitbake/lib/bb/tests/codeparser.py b/poky/bitbake/lib/bb/tests/codeparser.py
index 3fd76a8..826a2d2 100644
--- a/poky/bitbake/lib/bb/tests/codeparser.py
+++ b/poky/bitbake/lib/bb/tests/codeparser.py
@@ -1,23 +1,10 @@
-# ex:ts=4:sw=4:sts=4:et
-# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 #
 # BitBake Test for codeparser.py
 #
 # Copyright (C) 2010 Chris Larson
 # Copyright (C) 2012 Richard Purdie
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# SPDX-License-Identifier: GPL-2.0-only
 #
 
 import unittest
diff --git a/poky/bitbake/lib/bb/tests/cooker.py b/poky/bitbake/lib/bb/tests/cooker.py
index 2b44236..090916e 100644
--- a/poky/bitbake/lib/bb/tests/cooker.py
+++ b/poky/bitbake/lib/bb/tests/cooker.py
@@ -1,20 +1,7 @@
-# ex:ts=4:sw=4:sts=4:et
-# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 #
 # BitBake Tests for cooker.py
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# SPDX-License-Identifier: GPL-2.0-only
 #
 
 import unittest
diff --git a/poky/bitbake/lib/bb/tests/cow.py b/poky/bitbake/lib/bb/tests/cow.py
index d149d84..b4af4bb 100644
--- a/poky/bitbake/lib/bb/tests/cow.py
+++ b/poky/bitbake/lib/bb/tests/cow.py
@@ -1,23 +1,10 @@
-# ex:ts=4:sw=4:sts=4:et
-# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 #
 # BitBake Tests for Copy-on-Write (cow.py)
 #
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # Copyright 2006 Holger Freyther <freyther@handhelds.org>
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-#
 
 import unittest
 import os
diff --git a/poky/bitbake/lib/bb/tests/data.py b/poky/bitbake/lib/bb/tests/data.py
index 3c511f2..3cf5abe 100644
--- a/poky/bitbake/lib/bb/tests/data.py
+++ b/poky/bitbake/lib/bb/tests/data.py
@@ -1,23 +1,10 @@
-# ex:ts=4:sw=4:sts=4:et
-# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 #
 # BitBake Tests for the Data Store (data.py/data_smart.py)
 #
 # Copyright (C) 2010 Chris Larson
 # Copyright (C) 2012 Richard Purdie
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# SPDX-License-Identifier: GPL-2.0-only
 #
 
 import unittest
diff --git a/poky/bitbake/lib/bb/tests/event.py b/poky/bitbake/lib/bb/tests/event.py
index d3a5f62..b6e40c6 100644
--- a/poky/bitbake/lib/bb/tests/event.py
+++ b/poky/bitbake/lib/bb/tests/event.py
@@ -1,22 +1,9 @@
-# ex:ts=4:sw=4:sts=4:et
-# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 #
 # BitBake Tests for the Event implementation (event.py)
 #
 # Copyright (C) 2017 Intel Corporation
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# SPDX-License-Identifier: GPL-2.0-only
 #
 
 import unittest
diff --git a/poky/bitbake/lib/bb/tests/fetch.py b/poky/bitbake/lib/bb/tests/fetch.py
index 429998b..97656df 100644
--- a/poky/bitbake/lib/bb/tests/fetch.py
+++ b/poky/bitbake/lib/bb/tests/fetch.py
@@ -1,22 +1,9 @@
-# ex:ts=4:sw=4:sts=4:et
-# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 #
 # BitBake Tests for the Fetcher (fetch2/)
 #
 # Copyright (C) 2012 Richard Purdie
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# SPDX-License-Identifier: GPL-2.0-only
 #
 
 import unittest
diff --git a/poky/bitbake/lib/bb/tests/parse.py b/poky/bitbake/lib/bb/tests/parse.py
index 1bc4740..9afd1b2 100644
--- a/poky/bitbake/lib/bb/tests/parse.py
+++ b/poky/bitbake/lib/bb/tests/parse.py
@@ -1,22 +1,9 @@
-# ex:ts=4:sw=4:sts=4:et
-# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 #
 # BitBake Test for lib/bb/parse/
 #
 # Copyright (C) 2015 Richard Purdie
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# SPDX-License-Identifier: GPL-2.0-only
 #
 
 import unittest
@@ -187,3 +174,21 @@
         self.assertEqual(d1.getVar("VAR_var"), "B")
         self.assertEqual(d2.getVar("VAR_var"), None)
 
+    addtask_deltask = """
+addtask do_patch after do_foo after do_unpack before do_configure before do_compile
+addtask do_fetch do_patch
+
+deltask do_fetch do_patch
+"""
+    def test_parse_addtask_deltask(self):
+        import sys
+        f = self.parsehelper(self.addtask_deltask)
+        d = bb.parse.handle(f.name, self.d)['']
+
+        stdout = sys.stdout.getvalue()
+        self.assertTrue("addtask contained multiple 'before' keywords" in stdout)
+        self.assertTrue("addtask contained multiple 'after' keywords" in stdout)
+        self.assertTrue('addtask ignored: " do_patch"' in stdout)
+        self.assertTrue('deltask ignored: " do_patch"' in stdout)
+        #self.assertTrue('dependent task do_foo for do_patch does not exist' in stdout)
+
diff --git a/poky/bitbake/lib/bb/tests/persist_data.py b/poky/bitbake/lib/bb/tests/persist_data.py
index 812bcbd..f641b5a 100644
--- a/poky/bitbake/lib/bb/tests/persist_data.py
+++ b/poky/bitbake/lib/bb/tests/persist_data.py
@@ -1,22 +1,9 @@
-# ex:ts=4:sw=4:sts=4:et
-# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 #
 # BitBake Test for lib/bb/persist_data/
 #
 # Copyright (C) 2018 Garmin Ltd.
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# SPDX-License-Identifier: GPL-2.0-only
 #
 
 import unittest
diff --git a/poky/bitbake/lib/bb/tests/utils.py b/poky/bitbake/lib/bb/tests/utils.py
index f1cd83a..4d78828 100644
--- a/poky/bitbake/lib/bb/tests/utils.py
+++ b/poky/bitbake/lib/bb/tests/utils.py
@@ -1,22 +1,9 @@
-# ex:ts=4:sw=4:sts=4:et
-# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
 #
 # BitBake Tests for utils.py
 #
 # Copyright (C) 2012 Richard Purdie
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# SPDX-License-Identifier: GPL-2.0-only
 #
 
 import unittest