diff --git a/libraries.api.php b/libraries.api.php
index ac09743..16d0bf8 100644
--- a/libraries.api.php
+++ b/libraries.api.php
@@ -162,10 +162,13 @@
  *         variant, a boolean indicating whether the variant is installed or
  *         not.
  *       Note that in this group the 'versions' property is no longer available.
- *     - pre-load: Callbacks registered in this group are applied directly
- *       before this library is loaded. At this point the library contains
- *       variant-specific information, if specified. Note that in this group the
- *       'variants' property is no longer available.
+ *     - pre-dependencies-load: Callbacks registered in this group are applied
+ *       directly before the library's dependencies are loaded. At this point
+ *       the library contains variant-specific information, if specified. Note
+ *       that in this group the 'variants' property is no longer available.
+ *     - pre-load: Callbacks registered in this group are applied directly after
+ *       the library's dependencies are loaded and before the library itself is
+ *       loaded. 
  *     - post-load: Callbacks registered in this group are applied directly
  *       after this library is loaded. At this point, the library contains a
  *       'loaded' key, which contains the number of files that were loaded.
diff --git a/tests/libraries.test b/tests/libraries.test
index 67b91f6..1770162 100644
--- a/tests/libraries.test
+++ b/tests/libraries.test
@@ -392,11 +392,13 @@ class LibrariesTestCase extends DrupalWebTestCase {
     $this->verbose('Actual:<pre>' . var_export($library, TRUE) . '</pre>');
     $this->assertEqual($library, $expected, 'Detect callback was applied correctly.');
 
-    // Test a callback in the 'pre-load' and 'post-load' phases.
+    // Test a callback in the 'pre-dependencies-load', 'pre-load' and
+    // 'post-load' phases.
     // Successfully loaded libraries should only contain information about the
     // already loaded variant.
     unset($expected['variants']);
     $expected['loaded'] = 0;
+    $expected['pre-dependencies-load callback'] = 'applied (top-level)';
     $expected['pre-load callback'] = 'applied (top-level)';
     $expected['post-load callback'] = 'applied (top-level)';
     $library = libraries_load('example_callback');