diff --git a/tests/coverage/bug00318.phpt b/tests/coverage/bug00318.phpt
index 0b899c5b5..490add5a9 100644
--- a/tests/coverage/bug00318.phpt
+++ b/tests/coverage/bug00318.phpt
@@ -1,7 +1,7 @@
 --TEST--
 Test for bug #318: Segmentation Fault in code coverage analysis
 --INI--
-xdebug.mode=coverage
+xdebug.mode=develop,coverage
 --FILE--
 <?php
 // Run me from the PHP CLI
@@ -12,3 +12,5 @@ xdebug_stop_code_coverage();
 ?>
 --EXPECTF--
 Fatal error: %sbreak%s in %sbug00318.inc on line 3
+
+Call Stack:%A
diff --git a/tests/coverage/bug00670.phpt b/tests/coverage/bug00670.phpt
index fa4a24528..21df54cf1 100644
--- a/tests/coverage/bug00670.phpt
+++ b/tests/coverage/bug00670.phpt
@@ -1,7 +1,7 @@
 --TEST--
 Test for bug #670: Xdebug crashes with broken "break x" code
 --INI--
-xdebug.mode=coverage
+xdebug.mode=develop,coverage
 --FILE--
 <?php
 xdebug_start_code_coverage( XDEBUG_CC_DEAD_CODE | XDEBUG_CC_UNUSED );
@@ -10,3 +10,5 @@ echo "OK\n";
 ?>
 --EXPECTF--
 Fatal error: Cannot 'break' 2 levels in %s670-ConsistentHashing.inc on line 146
+
+Call Stack:%A