diff --git a/spec/ameba/inline_comments_spec.cr b/spec/ameba/inline_comments_spec.cr
index 593a6fc2..3f3b2e18 100644
--- a/spec/ameba/inline_comments_spec.cr
+++ b/spec/ameba/inline_comments_spec.cr
@@ -6,17 +6,22 @@ module Ameba
       subject = InlineComments::COMMENT_DIRECTIVE_REGEX
 
       it "allows to parse action and rule name" do
-        result = subject.match("#ameba:enable Group/RuleName")
-        result.should_not be_nil
-        result.not_nil![1].should eq "enable"
-        result.not_nil![2].should eq "Group/RuleName"
+        result = subject.match("# ameba:enable Group/RuleName")
+        result = result.should_not be_nil
+        result["action"].should eq "enable"
+        result["rules"].should eq "Group/RuleName"
       end
 
-      it "ignores the repeatable spaces" do
+      it "parses multiple rules" do
+        result = subject.match("# ameba:enable Group/RuleName, OtherRule, Foo/Bar")
+        result = result.should_not be_nil
+        result["action"].should eq "enable"
+        result["rules"].should eq "Group/RuleName, OtherRule, Foo/Bar"
+      end
+
+      it "fails to parse directives with spaces" do
         result = subject.match("# ameba  :  enable     Group/RuleName")
-        result.should_not be_nil
-        result.not_nil![1].should eq "enable"
-        result.not_nil![2].should eq "Group/RuleName"
+        result.should be_nil
       end
     end
 
diff --git a/spec/ameba/rule/lint/bad_directive_spec.cr b/spec/ameba/rule/lint/bad_directive_spec.cr
index 74b7891d..5667982d 100644
--- a/spec/ameba/rule/lint/bad_directive_spec.cr
+++ b/spec/ameba/rule/lint/bad_directive_spec.cr
@@ -28,7 +28,7 @@ module Ameba::Rule::Lint
 
     it "reports if there are incorrect rule names" do
       s = Source.new %(
-        # ameba:enable BadRule1,BadRule2
+        # ameba:enable BadRule1, BadRule2
       ), "source.cr"
       subject.catch(s).should_not be_valid
       s.issues.size.should eq 1
diff --git a/src/ameba/inline_comments.cr b/src/ameba/inline_comments.cr
index 998e75c7..cece57fe 100644
--- a/src/ameba/inline_comments.cr
+++ b/src/ameba/inline_comments.cr
@@ -1,7 +1,7 @@
 module Ameba
   # A module that utilizes inline comments parsing and processing logic.
   module InlineComments
-    COMMENT_DIRECTIVE_REGEX = Regex.new "# ameba : (\\w+) ([\\w/, ]*)".gsub(" ", "\\s*")
+    COMMENT_DIRECTIVE_REGEX = /# ameba:(?<action>\w+) (?<rules>\w+(?:\/\w+)?(?:,? \w+(?:\/\w+)?)*)/
 
     # Available actions in the inline comments
     enum Action
@@ -68,10 +68,10 @@ module Ameba
     #
     def parse_inline_directive(line)
       if directive = COMMENT_DIRECTIVE_REGEX.match(line)
-        return if commented_out?(line.gsub directive[0], "")
+        return if commented_out?(line.gsub(directive[0], ""))
         {
-          action: directive[1],
-          rules:  directive[2].split(/[\s,]/, remove_empty: true),
+          action: directive["action"],
+          rules:  directive["rules"].split(/[\s,]/, remove_empty: true),
         }
       end
     end
@@ -83,8 +83,8 @@ module Ameba
       end
     end
 
-    private def comment?(line)
-      return true if line.lstrip.starts_with? '#'
+    private def comment?(line : String)
+      line.lstrip.starts_with? '#'
     end
 
     private def line_disabled?(line, rule)
@@ -96,7 +96,7 @@ module Ameba
     private def commented_out?(line)
       commented = false
 
-      lexer = Crystal::Lexer.new(line).tap { |l| l.comments_enabled = true }
+      lexer = Crystal::Lexer.new(line).tap(&.comments_enabled = true)
       Tokenizer.new(lexer).run { |t| commented = true if t.type == :COMMENT }
       commented
     end
diff --git a/src/ameba/rule/lint/bad_directive.cr b/src/ameba/rule/lint/bad_directive.cr
index 882c6b7d..76b6d358 100644
--- a/src/ameba/rule/lint/bad_directive.cr
+++ b/src/ameba/rule/lint/bad_directive.cr
@@ -48,7 +48,7 @@ module Ameba::Rule::Lint
 
     private def check_rules(source, token, rules)
       bad_names = rules - ALL_RULE_NAMES - ALL_GROUP_NAMES
-      issue_for token, "Such rules do not exist: %s" % bad_names.join(", ") if bad_names.any?
+      issue_for token, "Such rules do not exist: %s" % bad_names.join(", ") unless bad_names.empty?
     end
   end
 end