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-rw-r--r--actionpack/test/controller/helper_test.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/actionpack/test/controller/helper_test.rb b/actionpack/test/controller/helper_test.rb
index 03dbd63614..de8072a994 100644
--- a/actionpack/test/controller/helper_test.rb
+++ b/actionpack/test/controller/helper_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require "abstract_unit"
ActionController::Base.helpers_path = File.expand_path("../fixtures/helpers", __dir__)
@@ -106,7 +108,7 @@ class HelperTest < ActiveSupport::TestCase
def setup
# Increment symbol counter.
- @symbol = (@@counter ||= "A0").succ!.dup
+ @symbol = (@@counter ||= "A0").succ.dup
# Generate new controller class.
controller_class_name = "Helper#{@symbol}Controller"