diff --git a/tempest/scenario/test_volume_boot_pattern.py b/tempest/scenario/test_volume_boot_pattern.py
index 4ce57db..998f1a4 100644
--- a/tempest/scenario/test_volume_boot_pattern.py
+++ b/tempest/scenario/test_volume_boot_pattern.py
@@ -32,6 +32,11 @@
      * Boot an additional instance from the new snapshot based volume
      * Check written content in the instance booted from snapshot
     """
+
+    # Boot from volume scenario is quite slow, and needs extra
+    # breathing room to get through deletes in the time allotted.
+    TIMEOUT_SCALING_FACTOR = 2
+
     @classmethod
     def skip_checks(cls):
         super(TestVolumeBootPattern, cls).skip_checks()
diff --git a/tempest/test.py b/tempest/test.py
index cee4e7e..fb801d8 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -236,6 +236,9 @@
     # Client manager class to use in this test case.
     client_manager = clients.Manager
 
+    # A way to adjust slow test classes
+    TIMEOUT_SCALING_FACTOR = 1
+
     @classmethod
     def setUpClass(cls):
         # It should never be overridden by descendants
@@ -406,7 +409,7 @@
         at_exit_set.add(self.__class__)
         test_timeout = os.environ.get('OS_TEST_TIMEOUT', 0)
         try:
-            test_timeout = int(test_timeout)
+            test_timeout = int(test_timeout) * self.TIMEOUT_SCALING_FACTOR
         except ValueError:
             test_timeout = 0
         if test_timeout > 0: