diff --git a/Gemfile.lock b/Gemfile.lock
index 40d8bdc..147c7bd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     rain (1.0.8)
       capistrano
-      rails (~> 3.2.8)
+      rails
       thor
 
 GEM
diff --git a/lib/rain/git_tools.rb b/lib/rain/git_tools.rb
index 4a14a2a..1b0f03e 100644
--- a/lib/rain/git_tools.rb
+++ b/lib/rain/git_tools.rb
@@ -85,7 +85,11 @@ def push_tag(tag)
   # what is/what would have been executed onto stdout.
   def run_cmd(cmd)
     puts "executing... #{cmd}"
-    %x(#{cmd}) unless ENV['RAILS_ENV'] == "test"
+    Bundler.with_clean_env { %x(#{cmd}) } unless testing?
+  end
+
+  def testing?
+    ENV['RAILS_ENV'] == "test"
   end
 
   # Full path of the versions.yml file in the Rails app.