diff --git a/test/cl/implementation.lisp b/test/cl/implementation.lisp
index 65a79b5..0caf7be 100644
--- a/test/cl/implementation.lisp
+++ b/test/cl/implementation.lisp
@@ -132,4 +132,5 @@
 
 (defun thrift.test.second-service-implementation:secondtest-string (thing)
   (format t "secondtestString(~a)~%" thing)
-  thing)
+  (concatenate 'string "testString(\"" thing "\")"))
+
diff --git a/test/known_failures_Linux.json b/test/known_failures_Linux.json
index a0bd542..6958ff5 100644
--- a/test/known_failures_Linux.json
+++ b/test/known_failures_Linux.json
@@ -17,15 +17,8 @@
   "cl-c_glib_multi_framed-ip",
   "cl-c_glib_multi-binary_buffered-ip",
   "cl-c_glib_multi-binary_framed-ip",
-  "cl-csharp_multi_buffered-ip",
-  "cl-csharp_multi_framed-ip",
   "cl-go_binary_buffered-ip",
   "cl-go_binary_framed-ip",
-  "cl-java_multi_buffered-ip",
-  "cl-java_multi_framed-ip",
-  "cl-java_multi_framed-fastframed-ip",
-  "cl-perl_multi_buffered-ip",
-  "cl-perl_multi_framed-ip",
   "cl-rb_binary_buffered-ip",
   "cl-rb_binary_framed-ip",
   "cl-rb_binary-accel_buffered-ip",