diff --git a/test/cases/vendor.css b/test/cases/vendor.css
index 71231357..7870489b 100644
--- a/test/cases/vendor.css
+++ b/test/cases/vendor.css
@@ -12,4 +12,5 @@
 }
 #login {
   opacity: 0.75;
+  white-space: nowrap;
 }
diff --git a/test/cases/vendor.styl b/test/cases/vendor.styl
index be983463..eb08b587 100644
--- a/test/cases/vendor.styl
+++ b/test/cases/vendor.styl
@@ -11,4 +11,5 @@
 support-for-ie = false
 
 #login
-  opacity: 0.75
\ No newline at end of file
+  opacity: 0.75
+  whitespace: no-wrap
\ No newline at end of file