diff --git a/spec/support/sass_support.rb b/spec/support/sass_support.rb
index bad4a7df..4775d85a 100644
--- a/spec/support/sass_support.rb
+++ b/spec/support/sass_support.rb
@@ -1,7 +1,7 @@
 module SassSupport
   def generate_css
     _mkdir("tmp")
-    `sass -I . --update test:tmp`
+    `sass -I . --update test:tmp --precision 5`
   end
 
   def clean_up