diff --git a/lib/nesta/config.rb b/lib/nesta/config.rb
index 758bca36..93cf548a 100644
--- a/lib/nesta/config.rb
+++ b/lib/nesta/config.rb
@@ -91,7 +91,7 @@ def self.yaml_exists?
     private_class_method :yaml_exists?
 
     def self.can_use_yaml?
-      ENV.keys.grep(/^NESTA/).empty? && yaml_exists?
+      yaml_exists?
     end
     private_class_method :can_use_yaml?
 
diff --git a/spec/config_spec.rb b/spec/config_spec.rb
index a9437db3..66886d20 100644
--- a/spec/config_spec.rb
+++ b/spec/config_spec.rb
@@ -18,10 +18,10 @@
       @title = "Title from ENV"
       ENV["NESTA_TITLE"] = @title
     end
-    
-    it "should never try and access config.yml" do
+
+    it "should fallback to config.yml" do
       stub_config_key("subtitle", "Subtitle in YAML file")
-      Nesta::Config.subtitle.should be_nil
+      Nesta::Config.subtitle.should == "Subtitle in YAML file"
     end
 
     it "should override config.yml" do