diff --git a/Gemfile.lock b/Gemfile.lock
index e9dec95..ac28a29 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -52,9 +52,11 @@ GEM
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.25.1)
+    minitest (5.16.2)
     multi_json (1.12.1)
     pg (0.19.0)
     polyglot (0.3.5)
+    power_assert (2.0.1)
     rack (1.4.7)
     rack-cache (1.6.1)
       rack (>= 0.4)
@@ -89,6 +91,8 @@ GEM
       hike (~> 1.2)
       rack (~> 1.0)
       tilt (~> 1.1, != 1.3.0)
+    test-unit (3.5.3)
+      power_assert
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)
       ref
@@ -97,7 +101,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.52)
+    tzinfo (0.3.61)
     uglifier (3.0.4)
       execjs (>= 0.3.0, < 3)
 
@@ -108,9 +112,11 @@ DEPENDENCIES
   coffee-rails (~> 3.2.1)
   jquery-rails
   json (~> 2.0.0)
+  minitest
   pg
   rails (= 3.2.6)
   sass-rails (~> 3.2.3)
+  test-unit
   therubyracer
   uglifier (>= 1.0.3)