diff --git a/test/known_failures_Linux.json b/test/known_failures_Linux.json
index 0cf9601..416a53d 100644
--- a/test/known_failures_Linux.json
+++ b/test/known_failures_Linux.json
@@ -229,6 +229,9 @@
   "go-nodejs_json_framed-ip",
   "go-nodejs_json_framed-ip-ssl",
   "go-perl_binary_buffered-ip",
+  "go-perl_binary_buffered-ip-ssl",
+  "go-perl_binary_framed-ip",
+  "go-perl_binary_framed-ip-ssl",
   "go-php_binary_buffered-ip",
   "go-php_binary_framed-ip",
   "go-php_compact_buffered-ip",
@@ -436,6 +439,7 @@
   "nodejs-rb_compact_framed-ip",
   "nodejs-rb_json_buffered-ip",
   "nodejs-rb_json_framed-ip",
+  "perl-php_binary_framed-ip",
   "py-c_glib_accel-binary_buffered-ip",
   "py-c_glib_accel-binary_framed-ip",
   "py-c_glib_binary_buffered-ip",