diff --git a/src/pytest_dependency.py b/src/pytest_dependency.py
index 9aea0c7..5e16c80 100644
--- a/src/pytest_dependency.py
+++ b/src/pytest_dependency.py
@@ -25,6 +25,11 @@ def __str__(self):
         return "Status(%s)" % ", ".join(l)
 
     def addResult(self, rep):
+        existing = self.results[rep.when]
+        outcome = rep.outcome
+        if existing is not None and existing != 'passed':
+            #don't override a failng case
+            return
         self.results[rep.when] = rep.outcome
 
     def isSuccess(self):