diff --git a/spec/data/zone_spec.rb b/spec/data/zone_spec.rb
index 05ae2ab..f4f816f 100644
--- a/spec/data/zone_spec.rb
+++ b/spec/data/zone_spec.rb
@@ -176,6 +176,10 @@ def stub_time(utc_now)
         expect( ZoneOffset.detect?('August 9, 6:56 AM -10') ).to be true
       end
 
+      it 'returns false when only given a year' do
+        expect( ZoneOffset.detect?('August 9, 6:56 AM 2017') ).to be false
+      end
+
       it 'returns false when part of a date' do
         expect( ZoneOffset.detect?('2017-10-10') ).to be false
       end