diff --git a/Guardfile b/Guardfile
index 8a43f414ca9ecab21ffe9d0b50f1022489dd829f..21ee2a9d6104e6638df24b628a0c41ff7e965b8d 100644
--- a/Guardfile
+++ b/Guardfile
@@ -2,7 +2,7 @@
 
 # More info at https://github.com/guard/guard#readme
 
-cmd = ENV['SPRING'] ? 'spring rspec' : 'bundle exec rspec'
+cmd = ENV['GUARD_CMD'] || (ENV['SPRING'] ? 'spring rspec' : 'bundle exec rspec')
 
 guard :rspec, cmd: cmd do
   require "guard/rspec/dsl"