diff --git a/Library/Homebrew/rubocops/cask/homepage_url_trailing_slash.rb b/Library/Homebrew/rubocops/cask/homepage_url_trailing_slash.rb
index 68a2ea7e35..220acaca83 100644
--- a/Library/Homebrew/rubocops/cask/homepage_url_trailing_slash.rb
+++ b/Library/Homebrew/rubocops/cask/homepage_url_trailing_slash.rb
@@ -15,7 +15,13 @@ module RuboCop
 
         def on_homepage_stanza(stanza)
           url_node = stanza.stanza_node.first_argument
-          url = url_node.str_content
+
+          url = if url_node.dstr_type?
+            # Remove quotes from interpolated string.
+            url_node.source[1..-2]
+          else
+            url_node.str_content
+          end
 
           return unless url&.match?(%r{^.+://[^/]+$})