diff --git a/src/ameba/rule/lint/comparison_to_boolean.cr b/src/ameba/rule/lint/comparison_to_boolean.cr
index 649d61a5..474cbc86 100644
--- a/src/ameba/rule/lint/comparison_to_boolean.cr
+++ b/src/ameba/rule/lint/comparison_to_boolean.cr
@@ -25,10 +25,11 @@ module Ameba::Rule::Lint
       description "Disallows comparison to booleans"
     end
 
-    MSG = "Comparison to a boolean is pointless"
+    MSG      = "Comparison to a boolean is pointless"
+    OP_NAMES = %w(== != ===)
 
     def test(source, node : Crystal::Call)
-      comparison = %w(== != ===).includes?(node.name)
+      comparison = node.name.in?(OP_NAMES)
       to_boolean = node.args.first?.try &.is_a?(Crystal::BoolLiteral) ||
                    node.obj.is_a?(Crystal::BoolLiteral)