diff --git a/spec/i18n_spec.rb b/spec/i18n_spec.rb
index 61687d4a427..d8cb8a20fbe 100644
--- a/spec/i18n_spec.rb
+++ b/spec/i18n_spec.rb
@@ -89,7 +89,8 @@
   end
 
   def extract_interpolation_arguments(translation)
-    translation.scan(I18n::INTERPOLATION_PATTERN).map(&:compact).map(&:first).to_set
+    translation.scan(Regexp.union(I18n::DEFAULT_INTERPOLATION_PATTERNS)).
+      map(&:compact).map(&:first).to_set
   end
 
   def flatten_hash(hash, parent_keys: [], out_hash: {}, &block)