diff --git a/src/ameba/formatter/dot_formatter.cr b/src/ameba/formatter/dot_formatter.cr
index e038f0b98..38abb0183 100644
--- a/src/ameba/formatter/dot_formatter.cr
+++ b/src/ameba/formatter/dot_formatter.cr
@@ -77,34 +77,12 @@ module Ameba::Formatter
       "Finished in #{to_human(finished - started)}".colorize(:default)
     end
 
-    private def to_human(span : Time::Span)
-      total_milliseconds = span.total_milliseconds
-      if total_milliseconds < 1
-        return "#{(span.total_milliseconds * 1_000).round.to_i} microseconds"
-      end
-
-      total_seconds = span.total_seconds
-      if total_seconds < 1
-        return "#{span.total_milliseconds.round(2)} milliseconds"
-      end
-
-      if total_seconds < 60
-        return "#{total_seconds.round(2)} seconds"
-      end
-
-      minutes = span.minutes
-      seconds = span.seconds
-
-      "#{minutes}:#{seconds < 10 ? "0" : ""}#{seconds} minutes"
-    end
-
     private def final_message(sources, failed_sources)
       total = sources.size
       failures = failed_sources.sum(&.issues.count(&.enabled?))
       color = failures == 0 ? :green : :red
-      s = failures != 1 ? "s" : ""
 
-      "#{total} inspected, #{failures} failure#{s}".colorize(color)
+      "#{total} inspected, #{failures} #{pluralize(failures, "failure")}".colorize(color)
     end
   end
 end
diff --git a/src/ameba/formatter/github_actions_formatter.cr b/src/ameba/formatter/github_actions_formatter.cr
index 92b7cc0c0..80ff5a0f0 100644
--- a/src/ameba/formatter/github_actions_formatter.cr
+++ b/src/ameba/formatter/github_actions_formatter.cr
@@ -1,8 +1,12 @@
+require "./util"
+
 module Ameba::Formatter
   # A formatter that outputs issues in a GitHub Actions compatible format.
   #
   # See [GitHub Actions documentation](https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/workflow-commands-for-github-actions) for details.
   class GitHubActionsFormatter < BaseFormatter
+    include Util
+
     @started_at : Time::Span?
     @mutex = Mutex.new
 
@@ -145,31 +149,6 @@ module Ameba::Formatter
       location_url || line_selector
     end
 
-    private def pluralize(count : Int, singular : String, plural = "#{singular}s")
-      count == 1 ? singular : plural
-    end
-
-    private def to_human(span : Time::Span)
-      total_milliseconds = span.total_milliseconds
-      if total_milliseconds < 1
-        return "#{(span.total_milliseconds * 1_000).round.to_i} microseconds"
-      end
-
-      total_seconds = span.total_seconds
-      if total_seconds < 1
-        return "#{span.total_milliseconds.round(2)} milliseconds"
-      end
-
-      if total_seconds < 60
-        return "#{total_seconds.round(2)} seconds"
-      end
-
-      minutes = span.minutes
-      seconds = span.seconds
-
-      "#{minutes}:#{seconds < 10 ? "0" : ""}#{seconds} minutes"
-    end
-
     private def command_name(severity : Severity) : String
       case severity
       in .error?      then "error"
diff --git a/src/ameba/formatter/util.cr b/src/ameba/formatter/util.cr
index b9dbe7336..99aa6986e 100644
--- a/src/ameba/formatter/util.cr
+++ b/src/ameba/formatter/util.cr
@@ -2,6 +2,31 @@ module Ameba::Formatter
   module Util
     extend self
 
+    def pluralize(count : Int, singular : String, plural = "#{singular}s")
+      count == 1 ? singular : plural
+    end
+
+    def to_human(span : Time::Span)
+      total_milliseconds = span.total_milliseconds
+      if total_milliseconds < 1
+        return "#{(span.total_milliseconds * 1_000).round.to_i} microseconds"
+      end
+
+      total_seconds = span.total_seconds
+      if total_seconds < 1
+        return "#{span.total_milliseconds.round(2)} milliseconds"
+      end
+
+      if total_seconds < 60
+        return "#{total_seconds.round(2)} seconds"
+      end
+
+      minutes = span.minutes
+      seconds = span.seconds
+
+      "#{minutes}:#{seconds < 10 ? "0" : ""}#{seconds} minutes"
+    end
+
     def deansify(message : String?) : String?
       message.try &.gsub(/\x1b[^m]*m/, "").presence
     end