diff --git a/Gemfile b/Gemfile
index 4861171ef5..f6e701c548 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,7 @@
 source 'https://rubygems.org'
 
+gem 'activerecord-nulldb-adapter'
+
 gem 'rails', '4.2.10'
 gem 'rails-deprecated_sanitizer', '~> 1.0.3'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 38944248f9..08ce4486ba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,6 +33,8 @@ GEM
       activemodel (= 4.2.8)
       activesupport (= 4.2.8)
       arel (~> 6.0)
+    activerecord-nulldb-adapter (0.3.7)
+      activerecord (>= 2.0.0)
     activerecord_sane_schema_dumper (0.2)
       rails (>= 4, < 5)
     activesupport (4.2.8)
@@ -963,6 +965,7 @@ PLATFORMS
 DEPENDENCIES
   RedCloth (~> 4.3.2)
   ace-rails-ap (~> 4.1.0)
+  activerecord-nulldb-adapter
   activerecord_sane_schema_dumper (= 0.2)
   acts-as-taggable-on (~> 4.0)
   addressable (~> 2.5.2)