diff --git a/lower-constraints.txt b/lower-constraints.txt
index e9a244a0..a032c7ca 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -11,7 +11,7 @@ fixtures==3.0.0
 flake8==2.5.5
 gitdb==0.6.4
 GitPython==1.0.1
-hacking==0.12.0
+hacking==2.0.0
 imagesize==0.7.1
 iso8601==0.1.11
 Jinja2==2.10
diff --git a/oslo_config/_i18n.py b/oslo_config/_i18n.py
index 41960f4e..7ef9d7aa 100644
--- a/oslo_config/_i18n.py
+++ b/oslo_config/_i18n.py
@@ -37,4 +37,4 @@ _P = _translators.plural_form
 
 
 def get_available_languages():
-        return oslo_i18n.get_available_languages(DOMAIN)
+    return oslo_i18n.get_available_languages(DOMAIN)
diff --git a/oslo_config/tests/test_cfg.py b/oslo_config/tests/test_cfg.py
index 302f39fd..98bd8e38 100644
--- a/oslo_config/tests/test_cfg.py
+++ b/oslo_config/tests/test_cfg.py
@@ -2893,7 +2893,7 @@ class TemplateSubstitutionTestCase(BaseTestCase):
 
         paths = self.create_tempfiles([('test',
                                         '[DEFAULT]\n'
-                                        'bar=foo-somethin\$k2\n')])
+                                        'bar=foo-somethin\\$k2\n')])
 
         self.conf(['--config-file', paths[0]])
 
diff --git a/test-requirements.txt b/test-requirements.txt
index 0d3ddef0..2d1247de 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=2.0.0,<2.1.0 # Apache-2.0
 
 fixtures>=3.0.0 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD