diff --git a/test/known_failures_Linux.json b/test/known_failures_Linux.json
index e165aa4..d1c21eb 100644
--- a/test/known_failures_Linux.json
+++ b/test/known_failures_Linux.json
@@ -214,18 +214,24 @@
   "d-cpp_binary_framed-ip-ssl",
   "d-cpp_binary_http-ip",
   "d-cpp_binary_http-ip-ssl",
+  "d-cpp_binary_zlib-ip",
+  "d-cpp_binary_zlib-ip-ssl",
   "d-cpp_compact_buffered-ip",
   "d-cpp_compact_buffered-ip-ssl",
   "d-cpp_compact_framed-ip",
   "d-cpp_compact_framed-ip-ssl",
   "d-cpp_compact_http-ip",
   "d-cpp_compact_http-ip-ssl",
+  "d-cpp_compact_zlib-ip",
+  "d-cpp_compact_zlib-ip-ssl",
   "d-cpp_json_buffered-ip",
   "d-cpp_json_buffered-ip-ssl",
   "d-cpp_json_framed-ip",
   "d-cpp_json_framed-ip-ssl",
   "d-cpp_json_http-ip",
   "d-cpp_json_http-ip-ssl",
+  "d-cpp_json_zlib-ip",
+  "d-cpp_json_zlib-ip-ssl",
   "d-d_binary_http-ip",
   "d-d_compact_http-ip",
   "d-d_json_http-ip",
@@ -270,60 +276,80 @@
   "d-py3_binary-accel_framed-ip-ssl",
   "d-py3_binary-accel_http-ip",
   "d-py3_binary-accel_http-ip-ssl",
+  "d-py3_binary-accel_zlib-ip",
+  "d-py3_binary-accel_zlib-ip-ssl",
   "d-py3_binary_buffered-ip",
   "d-py3_binary_buffered-ip-ssl",
   "d-py3_binary_framed-ip",
   "d-py3_binary_framed-ip-ssl",
   "d-py3_binary_http-ip",
   "d-py3_binary_http-ip-ssl",
+  "d-py3_binary_zlib-ip",
+  "d-py3_binary_zlib-ip-ssl",
   "d-py3_compact-accelc_buffered-ip",
   "d-py3_compact-accelc_buffered-ip-ssl",
   "d-py3_compact-accelc_framed-ip",
   "d-py3_compact-accelc_framed-ip-ssl",
   "d-py3_compact-accelc_http-ip",
   "d-py3_compact-accelc_http-ip-ssl",
+  "d-py3_compact-accelc_zlib-ip",
+  "d-py3_compact-accelc_zlib-ip-ssl",
   "d-py3_compact_buffered-ip",
   "d-py3_compact_buffered-ip-ssl",
   "d-py3_compact_framed-ip",
   "d-py3_compact_framed-ip-ssl",
   "d-py3_compact_http-ip",
   "d-py3_compact_http-ip-ssl",
+  "d-py3_compact_zlib-ip",
+  "d-py3_compact_zlib-ip-ssl",
   "d-py3_json_buffered-ip",
   "d-py3_json_buffered-ip-ssl",
   "d-py3_json_framed-ip",
   "d-py3_json_framed-ip-ssl",
   "d-py3_json_http-ip",
   "d-py3_json_http-ip-ssl",
+  "d-py3_json_zlib-ip",
+  "d-py3_json_zlib-ip-ssl",
   "d-py_binary-accel_buffered-ip",
   "d-py_binary-accel_buffered-ip-ssl",
   "d-py_binary-accel_framed-ip",
   "d-py_binary-accel_framed-ip-ssl",
   "d-py_binary-accel_http-ip",
   "d-py_binary-accel_http-ip-ssl",
+  "d-py_binary-accel_zlib-ip",
+  "d-py_binary-accel_zlib-ip-ssl",
   "d-py_binary_buffered-ip",
   "d-py_binary_buffered-ip-ssl",
   "d-py_binary_framed-ip",
   "d-py_binary_framed-ip-ssl",
   "d-py_binary_http-ip",
   "d-py_binary_http-ip-ssl",
+  "d-py_binary_zlib-ip",
+  "d-py_binary_zlib-ip-ssl",
   "d-py_compact-accelc_buffered-ip",
   "d-py_compact-accelc_buffered-ip-ssl",
   "d-py_compact-accelc_framed-ip",
   "d-py_compact-accelc_framed-ip-ssl",
   "d-py_compact-accelc_http-ip",
   "d-py_compact-accelc_http-ip-ssl",
+  "d-py_compact-accelc_zlib-ip",
+  "d-py_compact-accelc_zlib-ip-ssl",
   "d-py_compact_buffered-ip",
   "d-py_compact_buffered-ip-ssl",
   "d-py_compact_framed-ip",
   "d-py_compact_framed-ip-ssl",
   "d-py_compact_http-ip",
   "d-py_compact_http-ip-ssl",
+  "d-py_compact_zlib-ip",
+  "d-py_compact_zlib-ip-ssl",
   "d-py_json_buffered-ip",
   "d-py_json_buffered-ip-ssl",
   "d-py_json_framed-ip",
   "d-py_json_framed-ip-ssl",
   "d-py_json_http-ip",
   "d-py_json_http-ip-ssl",
+  "d-py_json_zlib-ip",
+  "d-py_json_zlib-ip-ssl",
   "erl-cpp_binary_buffered-ip",
   "erl-cpp_compact_buffered-ip",
   "erl-csharp_binary_buffered-ip",