diff --git a/ext/mysqli/tests/mysqli_fetch_array_large.phpt b/ext/mysqli/tests/mysqli_fetch_array_large.phpt
index 43cd0fab3fd9..21b74e8ab7ae 100644
--- a/ext/mysqli/tests/mysqli_fetch_array_large.phpt
+++ b/ext/mysqli/tests/mysqli_fetch_array_large.phpt
@@ -7,6 +7,8 @@ mysqli
 if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
 require_once('skipifconnectfailure.inc');
 ?>
+--CONFLICTS--
+all
 --INI--
 memory_limit=-1
 --FILE--
diff --git a/ext/mysqli/tests/mysqli_stmt_bind_limits.phpt b/ext/mysqli/tests/mysqli_stmt_bind_limits.phpt
index 58a99c86e7f4..03a980d929c6 100644
--- a/ext/mysqli/tests/mysqli_stmt_bind_limits.phpt
+++ b/ext/mysqli/tests/mysqli_stmt_bind_limits.phpt
@@ -6,6 +6,8 @@ mysqli
 <?php
 require_once('skipifconnectfailure.inc');
 ?>
+--CONFLICTS--
+all
 --FILE--
 <?php
     require_once("connect.inc");
diff --git a/ext/oci8/tests/CONFLICTS b/ext/oci8/tests/CONFLICTS
index 176b41ab8bb6..ff6afc6fb083 100644
--- a/ext/oci8/tests/CONFLICTS
+++ b/ext/oci8/tests/CONFLICTS
@@ -1 +1,2 @@
-oci8
+# OCI tests are network intensive and may cause timeouts in other tests
+all
diff --git a/ext/pdo_oci/tests/CONFLICTS b/ext/pdo_oci/tests/CONFLICTS
index 176b41ab8bb6..ff6afc6fb083 100644
--- a/ext/pdo_oci/tests/CONFLICTS
+++ b/ext/pdo_oci/tests/CONFLICTS
@@ -1 +1,2 @@
-oci8
+# OCI tests are network intensive and may cause timeouts in other tests
+all
diff --git a/ext/standard/tests/file/bug81145.phpt b/ext/standard/tests/file/bug81145.phpt
index ea498b493ee7..f3258ff6019e 100644
--- a/ext/standard/tests/file/bug81145.phpt
+++ b/ext/standard/tests/file/bug81145.phpt
@@ -13,6 +13,8 @@ if (PHP_OS_FAMILY !== "Windows") {
     @unlink(__DIR__ . "/bug81145_src.bin");
 }
 ?>
+--CONFLICTS--
+all
 --FILE--
 <?php
 $src = __DIR__ . "/bug81145_src.bin";
diff --git a/ext/tidy/tests/parsing_file_too_large.phpt b/ext/tidy/tests/parsing_file_too_large.phpt
index abc64d5c17c3..25829bf4e959 100644
--- a/ext/tidy/tests/parsing_file_too_large.phpt
+++ b/ext/tidy/tests/parsing_file_too_large.phpt
@@ -8,6 +8,8 @@ if (PHP_INT_SIZE != 8) die("skip this test is for 64bit platform only");
 if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
 if (getenv("SKIP_ASAN")) die("skip too big for asan");
 ?>
+--CONFLICTS--
+all
 --INI--
 memory_limit="5G"
 --FILE--
diff --git a/sapi/cli/tests/upload_2G.phpt b/sapi/cli/tests/upload_2G.phpt
index 7ca917722919..1cf883cd9d3a 100644
--- a/sapi/cli/tests/upload_2G.phpt
+++ b/sapi/cli/tests/upload_2G.phpt
@@ -42,6 +42,8 @@ if (getenv('SKIP_PERF_SENSITIVE')) {
     die("skip Test may be very slow if PHP is instrumented");
 }
 ?>
+--CONFLICTS--
+all
 --FILE--
 <?php