diff --git a/test/framework/easyblock.py b/test/framework/easyblock.py
index 2e4953b8bc..5b6807ef1e 100644
--- a/test/framework/easyblock.py
+++ b/test/framework/easyblock.py
@@ -1018,6 +1018,32 @@ def test_handle_iterate_opts(self):
         self.assertEqual(eb.cfg.iterating, False)
         self.assertEqual(eb.cfg['configopts'], ["--opt1 --anotheropt", "--opt2", "--opt3 --optbis"])
 
+    def test_post_processing_step(self):
+        """Test post_processing_step and deprecated post_install_step."""
+        init_config(build_options={'silent': True})
+
+        test_ecs_dir = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'easyconfigs', 'test_ecs')
+        toy_ec_fn = os.path.join(test_ecs_dir, 't', 'toy', 'toy-0.0-gompi-2018a-test.eb')
+
+        # this import only works here, since EB_toy is a test easyblock
+        from easybuild.easyblocks.toy import EB_toy, EB_toy_deprecated
+
+        cwd = os.getcwd()
+        toy_ec = EasyConfig(toy_ec_fn)
+        eb = EB_toy_deprecated(toy_ec)
+        eb.silent = True
+        expected_error = r"DEPRECATED \(since v6.0\).*use EasyBlock.post_processing_step\(\) instead.*"
+        with self.mocked_stdout_stderr():
+            self.assertErrorRegex(EasyBuildError, expected_error, eb.run_all_steps, True)
+
+        change_dir(cwd)
+        toy_ec = EasyConfig(toy_ec_fn)
+        eb = EB_toy(toy_ec)
+        eb.silent = True
+        with self.mocked_stdout_stderr():
+            eb.run_all_steps(True)
+        assert os.path.exists(os.path.join(eb.installdir, 'lib', 'libtoy_post.a'))
+
     def test_extensions_step(self):
         """Test the extensions_step"""
         init_config(build_options={'silent': True})
diff --git a/test/framework/sandbox/easybuild/easyblocks/t/toy.py b/test/framework/sandbox/easybuild/easyblocks/t/toy.py
index 5727dcd0e0..6d6c23caf0 100644
--- a/test/framework/sandbox/easybuild/easyblocks/t/toy.py
+++ b/test/framework/sandbox/easybuild/easyblocks/t/toy.py
@@ -142,6 +142,12 @@ def install_step(self, name=None):
         mkdir(libdir, parents=True)
         write_file(os.path.join(libdir, 'lib%s.a' % name), name.upper())
 
+    def post_processing_step(self):
+        """Any postprocessing for toy"""
+        libdir = os.path.join(self.installdir, 'lib')
+        write_file(os.path.join(libdir, 'lib%s_post.a' % self.name), self.name.upper())
+        super(EB_toy, self).post_processing_step()
+
     @property
     def required_deps(self):
         """Return list of required dependencies for this extension."""
@@ -192,3 +198,11 @@ def make_module_extra(self):
         txt = super(EB_toy, self).make_module_extra()
         txt += self.module_generator.set_environment('TOY', os.getenv('TOY', '<TOY_env_var_not_defined>'))
         return txt
+
+
+class EB_toy_deprecated(EB_toy):
+    """Support for building/installing toy with deprecated post_install step."""
+
+    def post_install_step(self):
+        """Any postprocessing for toy (deprecated)"""
+        super(EB_toy, self).post_install_step(*arg)