selftest/bbtests.py: update test_bitbake_g()

index baae1e0..bec82f8 100644
@@ -114,11 +114,16 @@ class BitbakeTests(oeSelfTest):
 
     @testcase(167)
     def test_bitbake_g(self):
-        result = bitbake('-g core-image-full-cmdline')
         for f in ['pn-buildlist', 'pn-depends.dot', 'package-depends.dot', 'task-depends.dot']:
             self.addCleanup(os.remove, f)
-        self.assertTrue('NOTE: PN build list saved to \'pn-buildlist\'' in result.output, msg = "No dependency \"pn-buildlist\" file was generated for the given task target. bitbake output: %s" % result.output)
-        self.assertTrue('openssh' in ftools.read_file(os.path.join(self.builddir, 'pn-buildlist')), msg = "No \"openssh\" dependency found in pn-buildlist file.")
+        cmds = ('-g core-image-full-cmdline', '-g world', '-g world -cfetchall')
+        for cmd in cmds:
+            result = bitbake(cmd)
+            self.assertTrue('NOTE: PN build list saved to \'pn-buildlist\'' in result.output, \
+                msg = "No dependency \"pn-buildlist\" file was generated for the given task target. bitbake output: %s. Command: \"bitbake %s\"" % \
+                (result.output, cmd))
+            self.assertTrue('openssh' in ftools.read_file(os.path.join(self.builddir, 'pn-buildlist')), \
+                msg = "No \"openssh\" dependency found in pn-buildlist file. Command: %s" % cmd)
 
     @testcase(899)
     def test_image_manifest(self):