diff --git a/spec/loading_spec.rb b/spec/loading_spec.rb
index ec4f726..4d78f53 100644
--- a/spec/loading_spec.rb
+++ b/spec/loading_spec.rb
@@ -10,7 +10,7 @@ describe "My Vim plugin" do
   extensions = extensions.split(/[\n,]/)
 
   extensions.each do |ext|
-    if ext.match?(/[a-z\.]+/i)
+    if ext.match?(/^[a-z\.]+$/i)
       it "should parse #{ext} file" do
         Timeout::timeout(20) do
           write_file "#{ext}", ""