diff --git a/tests/use.t b/tests/use.t
index ad8499b..2231e8c 100644
--- a/tests/use.t
+++ b/tests/use.t
@@ -1,19 +1,35 @@
-Load unknown library.
+Use unknown library.
 
   $ antigen-use unknown
-  Antigen currently supports only following libraries:
+  Usage: antigen-use <library-name>
+  Where <library-name> is any one of the following:
    * oh-my-zsh
    * prezto
   [1]
 
-# Fixme: loading prezto or oh-my-zsh library breaks all the tests.
-# 
-# Load prezto library.
-# 
-#   $ antigen-use prezto &> /dev/null
-#   $ antigen-bundle git &> /dev/null
-# 
-# Load oh-my-zsh library.
-#  
-#   $ antigen-use oh-my-zsh &> /dev/null
-#   $ antigen-bundle git &> /dev/null
+Missing argument.
+
+  $ antigen-use
+  Usage: antigen-use <library-name>
+  Where <library-name> is any one of the following:
+   * oh-my-zsh
+   * prezto
+  [1]
+
+Mock out the library loading functions.
+
+  $ -antigen-use-oh-my-zsh () { echo Using oh-my-zsh. }
+  $ -antigen-use-prezto () { echo Using prezto. }
+
+Note: We lack tests for these internal functions. I'm not sure how feasible
+testing them is given they most certainly use the network.
+
+Use oh-my-zsh library.
+
+  $ antigen-use oh-my-zsh
+  Using oh-my-zsh.
+
+Use prezto library.
+
+  $ antigen-use prezto
+  Using prezto.