diff --git a/testing/btest/scripts/base/frameworks/logging/rotate.bro b/testing/btest/scripts/base/frameworks/logging/rotate.bro
index 86f659c193..501c0db8ea 100644
--- a/testing/btest/scripts/base/frameworks/logging/rotate.bro
+++ b/testing/btest/scripts/base/frameworks/logging/rotate.bro
@@ -1,5 +1,6 @@
 #
-# @TEST-EXEC: bro -b -r ${TRACES}/rotation.trace %INPUT 2>&1 | grep "test" >out
+# @TEST-EXEC: bro -b -r ${TRACES}/rotation.trace %INPUT >bro.out 2>&1
+# @TEST-EXEC: grep "test" bro.out | sort >out
 # @TEST-EXEC: for i in `ls test.*.log | sort`; do printf '> %s\n' $i; cat $i; done >>out
 # @TEST-EXEC: btest-diff out