diff --git a/runtests b/cross-shell-tests
similarity index 98%
rename from runtests
rename to cross-shell-tests
index 4b252b3..630816f 100755
--- a/runtests
+++ b/cross-shell-tests
@@ -12,3 +12,4 @@ for shell in dash bash ksh oksh pdksh zsh; do
     echo Skipping $shell because it is not in the PATH
   fi
 done
+echo
diff --git a/readme.md b/readme.md
index 2007415..fdde399 100644
--- a/readme.md
+++ b/readme.md
@@ -19,6 +19,12 @@ Run the tests
     cd urchin/tests
     ../urchin .    
 
+The above command will run the tests in your login shell; to test cross-shell
+compatibility, run this.
+
+    cd urchin
+    ./cross-shell-tests
+
 ## Globally
 Download Urchin like so (as root) (or use npm, below):