diff --git a/Library/Homebrew/cask/auditor.rb b/Library/Homebrew/cask/auditor.rb
index 0af5f20860..9fd21f2154 100644
--- a/Library/Homebrew/cask/auditor.rb
+++ b/Library/Homebrew/cask/auditor.rb
@@ -74,7 +74,7 @@ module Cask
     def audit
       errors = Set.new
 
-      if !language && (blocks = language_blocks)
+      if !language && !(blocks = language_blocks).empty?
         sample_languages = if blocks.length > LANGUAGE_BLOCK_LIMIT && !@audit_new_cask
           sample_keys = T.must(blocks.keys.sample(LANGUAGE_BLOCK_LIMIT))
           ohai "Auditing a sample of available languages for #{cask}: " \
@@ -140,7 +140,7 @@ module Cask
       audit.run!
     end
 
-    sig { returns(T.nilable(T::Hash[T::Array[String], T.proc.returns(T.untyped)])) }
+    sig { returns(T::Hash[T::Array[String], T.proc.returns(T.untyped)]) }
     def language_blocks
       cask.instance_variable_get(:@dsl).instance_variable_get(:@language_blocks)
     end