diff --git a/test/known_failures_Linux.json b/test/known_failures_Linux.json
index 2f21c3a..97551e2 100644
--- a/test/known_failures_Linux.json
+++ b/test/known_failures_Linux.json
@@ -204,6 +204,7 @@
   "hs-cpp_compact_framed-ip-ssl",
   "hs-cpp_compact_http-ip",
   "hs-cpp_compact_http-ip-ssl",
+  "hs-cpp_json_buffered-ip",
   "hs-cpp_json_buffered-ip-ssl",
   "hs-cpp_json_evhttp-http-ip",
   "hs-cpp_json_evhttp-http-ip-ssl",
@@ -274,6 +275,8 @@
   "hs-nodejs_json_buffered-ip-ssl",
   "hs-nodejs_json_framed-ip",
   "hs-nodejs_json_framed-ip-ssl",
+  "hs-php_binary_framed-ip",
+  "hs-php_compact_framed-ip",
   "hs-py_binary-accel_buffered-ip-ssl",
   "hs-py_binary-accel_framed-ip",
   "hs-py_binary-accel_framed-ip-ssl",
@@ -283,6 +286,7 @@
   "hs-py_compact_buffered-ip-ssl",
   "hs-py_compact_framed-ip",
   "hs-py_compact_framed-ip-ssl",
+  "hs-py_json_buffered-ip",
   "hs-py_json_buffered-ip-ssl",
   "hs-py_json_framed-ip",
   "hs-py_json_framed-ip-ssl",