diff --git a/tests/rules/test_brew_update_formula.py b/tests/rules/test_brew_update_formula.py
index 5cec48b..a35e1d9 100644
--- a/tests/rules/test_brew_update_formula.py
+++ b/tests/rules/test_brew_update_formula.py
@@ -4,7 +4,7 @@ from thefuck.rules.brew_update_formula import get_new_command, match
 
 
 output = ("Error: This command updates brew itself, and does not take formula"
-          " names.\nUse 'brew upgrade thefuck'.")
+          " names.\nUse `brew upgrade thefuck`.")
 
 
 def test_match():
diff --git a/thefuck/rules/brew_update_formula.py b/thefuck/rules/brew_update_formula.py
index 172df6a..4f2264a 100644
--- a/thefuck/rules/brew_update_formula.py
+++ b/thefuck/rules/brew_update_formula.py
@@ -5,7 +5,7 @@ from thefuck.utils import for_app
 def match(command):
     return ('update' in command.script
             and "Error: This command updates brew itself" in command.output
-            and "Use 'brew upgrade" in command.output)
+            and "Use `brew upgrade" in command.output)
 
 
 def get_new_command(command):