diff --git a/sapi/fpm/tests/015.phpt b/sapi/fpm/tests/015.phpt
index fba333e2561..c7af5f75726 100644
--- a/sapi/fpm/tests/015.phpt
+++ b/sapi/fpm/tests/015.phpt
@@ -2,6 +2,10 @@
 FPM: Test various messages on start, from master and childs
 --SKIPIF--
 <?php include "skipif.inc"; ?>
+--XFAIL--
+randomly intermittently failing all the time in CI,
+ERROR: unable to read what child say: Bad file descriptor (9)
+catch_workers_output = yes seems not reliable
 --FILE--
 <?php
 
diff --git a/sapi/fpm/tests/019.phpt b/sapi/fpm/tests/019.phpt
index cdf81262441..3ae4b348d94 100644
--- a/sapi/fpm/tests/019.phpt
+++ b/sapi/fpm/tests/019.phpt
@@ -29,7 +29,6 @@ pm.max_children = 5
 pm.start_servers = 2
 pm.min_spare_servers = 1
 pm.max_spare_servers = 3
-catch_workers_output = yes
 EOT;
 
 $fpm = run_fpm($cfg, $tail, '--prefix '.__DIR__);
diff --git a/sapi/fpm/tests/020.phpt b/sapi/fpm/tests/020.phpt
index d45eeccff86..dbd43d05fed 100644
--- a/sapi/fpm/tests/020.phpt
+++ b/sapi/fpm/tests/020.phpt
@@ -31,7 +31,6 @@ pm.max_children = 5
 pm.start_servers = 2
 pm.min_spare_servers = 1
 pm.max_spare_servers = 3
-catch_workers_output = yes
 EOT;
 
 $fpm = run_fpm($cfg, $tail);