diff --git a/test/BugPoint/crash-narrowfunctiontest.ll b/test/BugPoint/crash-narrowfunctiontest.ll
index 3ee9f8a..6ad09d2 100644
--- a/test/BugPoint/crash-narrowfunctiontest.ll
+++ b/test/BugPoint/crash-narrowfunctiontest.ll
@@ -1,6 +1,6 @@
 ; Test that bugpoint can narrow down the testcase to the important function
 ;
-; RUN: bugpoint %s -bugpoint-crashcalls -silence-passes > /dev/null
+; RUN: bugpoint %s -output-prefix %t -bugpoint-crashcalls -silence-passes > /dev/null
 
 define i32 @foo() { ret i32 1 }
 
diff --git a/test/BugPoint/remove_arguments_test.ll b/test/BugPoint/remove_arguments_test.ll
index e565597..fb17c78 100644
--- a/test/BugPoint/remove_arguments_test.ll
+++ b/test/BugPoint/remove_arguments_test.ll
@@ -1,4 +1,4 @@
-; RUN: bugpoint %s -bugpoint-crashcalls -silence-passes
+; RUN: bugpoint %s -output-prefix %t -bugpoint-crashcalls -silence-passes
 
 ; Test to make sure that arguments are removed from the function if they are 
 ; unnecessary.