diff --git a/Library/Homebrew/dependency.rb b/Library/Homebrew/dependency.rb
index c1e8780e86585..1b9c6cba5a6b9 100644
--- a/Library/Homebrew/dependency.rb
+++ b/Library/Homebrew/dependency.rb
@@ -41,7 +41,7 @@ def hash
   end
 
   def to_formula
-    formula = Formulary.factory(name)
+    formula = Formulary.factory(name, warn: false)
     formula.build = BuildOptions.new(options, formula.options)
     formula
   end
diff --git a/Library/Homebrew/test/utils/autoremove_spec.rb b/Library/Homebrew/test/utils/autoremove_spec.rb
index 258eb2b85c8ef..51ce249bb9136 100644
--- a/Library/Homebrew/test/utils/autoremove_spec.rb
+++ b/Library/Homebrew/test/utils/autoremove_spec.rb
@@ -54,7 +54,7 @@
     include_context "with formulae for dependency testing"
 
     before do
-      allow(Formulary).to receive(:factory).with("three").and_return(formula_is_build_dep)
+      allow(Formulary).to receive(:factory).with("three", { warn: false }).and_return(formula_is_build_dep)
     end
 
     context "when formulae are bottles" do