diff --git a/lib/flexmock/test_unit_integration.rb b/lib/flexmock/test_unit_integration.rb
index f918324..d5b146a 100755
--- a/lib/flexmock/test_unit_integration.rb
+++ b/lib/flexmock/test_unit_integration.rb
@@ -45,6 +45,12 @@ def teardown
   class TestUnitFrameworkAdapter
     include Test::Unit::Assertions
 
+    attr_accessor :assertions
+
+    def initialize
+      self.assertions = 0
+    end
+
     def make_assertion(msg, &block)
       unless yield
         msg = msg.call if msg.is_a?(Proc)