diff --git a/compiler-rt/test/asan/TestCases/Darwin/Inputs/check-syslog.sh b/compiler-rt/test/asan/TestCases/Darwin/Inputs/check-syslog.sh
new file mode 100755
index 0000000000000..8939ca7ca1564
--- /dev/null
+++ b/compiler-rt/test/asan/TestCases/Darwin/Inputs/check-syslog.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+for I in {1..3}; do \
+  log show --debug --last $((SECONDS + 30))s --predicate "processID == $1" --style syslog > $2; \
+  if grep -q "use-after-poison" $2; then break; fi; \
+  sleep 5; \
+done
diff --git a/compiler-rt/test/asan/TestCases/Darwin/duplicate_os_log_reports.cpp b/compiler-rt/test/asan/TestCases/Darwin/duplicate_os_log_reports.cpp
index 5a0353bfb1b31..40a168bc15290 100644
--- a/compiler-rt/test/asan/TestCases/Darwin/duplicate_os_log_reports.cpp
+++ b/compiler-rt/test/asan/TestCases/Darwin/duplicate_os_log_reports.cpp
@@ -1,8 +1,8 @@
 // UNSUPPORTED: ios
 // REQUIRES: darwin_log_cmd
 // RUN: %clangxx_asan -fsanitize-recover=address %s -o %t
-// RUN: { %env_asan_opts=halt_on_error=0,log_to_syslog=1 %run %t > %t.process_output.txt 2>&1 & } \
-// RUN: ; export TEST_PID=$! ; wait ${TEST_PID}
+// RUN: bash -c '{ %env_asan_opts=halt_on_error=0,log_to_syslog=1 %run %t > %t.process_output.txt 2>&1 & } \
+// RUN: ; export TEST_PID=$! ; wait ${TEST_PID}; echo -n ${TEST_PID} > %t.test_pid'
 
 // Check process output.
 // RUN: FileCheck %s --check-prefixes CHECK,CHECK-PROC -input-file=%t.process_output.txt
@@ -10,11 +10,7 @@
 // Check syslog output. We filter recent system logs based on PID to avoid
 // getting the logs of previous test runs. Make some reattempts in case there
 // is a delay.
-// RUN: for I in {1..3}; do \
-// RUN:   log show --debug --last $((SECONDS + 30))s --predicate "processID == ${TEST_PID}" --style syslog > %t.process_syslog_output.txt; \
-// RUN:   if grep -q "use-after-poison" %t.process_syslog_output.txt; then break; fi; \
-// RUN:   sleep 5; \
-// RUN: done
+// RUN: %S/Inputs/check-syslog.sh %{readfile:%t.test_pid} %t.process_syslog_output.txt
 // RUN: FileCheck %s -input-file=%t.process_syslog_output.txt
 #include <cassert>
 #include <cstdio>