diff --git a/lib/chai/core/assertions.js b/lib/chai/core/assertions.js
index 32fd72f2e..42d88d273 100644
--- a/lib/chai/core/assertions.js
+++ b/lib/chai/core/assertions.js
@@ -966,16 +966,22 @@ module.exports = function (chai, _) {
    * ### .keys(key1, [key2], [...])
    *
    * Asserts that the target contains any or all of the passed-in keys.
-   * When used in conjunction with `all`, every key that is passed in
-   * must exist in the target object. 
+   * Use in combination with `any`, `all`, `contains`, or `have` will affect 
+   * what will pass.
    * 
    * When used in conjunction with `any`, at least one key that is passed 
-   * in must exist in the target object. Use without the `any` or `all` 
-   * qualifiers is deprecated and will default to `all`. 
+   * in must exist in the target object. This is regardless whether or not 
+   * the `have` or `contain` qualifiers are used. Note, either `any` or `all`
+   * should be used in the assertion. If neither are used, the assertion is
+   * defaulted to `all`.
    * 
-   * Finally, use of the `all` qualifier in general requires that the number of
-   * keys passed in must match the number of keys in the target object unless
-   * the contains qualifier is also used.
+   * When both `all` and `contain` are used, the target object must have at 
+   * least all of the passed-in keys but may have more keys not listed.
+   * 
+   * When both `all` and `have` are used, the target object must both contain
+   * all of the passed-in keys AND the number of keys in the target object must
+   * match the number of keys passed in (in other words, a target object must 
+   * have all and only all of the passed-in keys).
    * 
    *     expect({ foo: 1, bar: 2 }).to.have.any.keys('foo', 'baz');
    *     expect({ foo: 1, bar: 2 }).to.have.any.keys('foo');