diff --git a/functional.hpp b/functional.hpp
index 8392c7372e72277f5dae56de4fab5097e90dc657..891230a6ab7f145af80016d0cbaf844c8cb9a85f 100644
--- a/functional.hpp
+++ b/functional.hpp
@@ -116,9 +116,7 @@ namespace rlib {
         }
 
         this_type &flat_map(std::function<buffer_type<value_type>(const value_type &)>) {
-
         }
-
     };
 }
 #endif
diff --git a/sys/sio.hpp b/sys/sio.hpp
index 925ff8dc5ce7bc9643dd684f378365fb24cdc7f7..5578fe4ce7ffed674d24f9fd43ced07bdde7e86b 100644
--- a/sys/sio.hpp
+++ b/sys/sio.hpp
@@ -709,11 +709,7 @@ namespace rlib {
             sendn_ex(fd, &head, sizeof(head), MSG_NOSIGNAL);
             sendn_ex(fd, dat.data(), head.len, MSG_NOSIGNAL);
         }
-
     };
-
-
 } // namespace rlib
 
-
 #endif
diff --git a/test/Makefile b/test/Makefile
index 636adc017d57ab731043e1d9f208cd4ae957fd22..5eca6ea3dbc4b4b313c089ee87fb676b0181f300 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -22,21 +22,8 @@
 MODULES=string meta trait stdio sio scope_guard
 
 XTRA_FLAGS ?=
-CXXFLAGS=-I. -I../.. $(XTRA_FLAGS)
 STD ?= 14
-FLAGS11=-std=c++11
-FLAGS14=-std=c++14
-FLAGS17=-std=c++17
-
-ifeq ($(STD),11)
-	CXXFLAGS := $(CXXFLAGS) $(FLAGS11)
-endif
-ifeq ($(STD),14)
-	CXXFLAGS := $(CXXFLAGS) $(FLAGS14)
-endif
-ifeq ($(STD),17)
-	CXXFLAGS := $(CXXFLAGS) $(FLAGS17)
-endif
+CXXFLAGS=-I. -I../.. $(XTRA_FLAGS) -std=c++$(STD)
 
 POSTFIX=$(STD)_$(CXX)
 
diff --git a/test/src/c.fish b/test/src/c.fish
deleted file mode 100644
index 61bf9f75590ea94324b2a7de1bf220d0bde5ea81..0000000000000000000000000000000000000000
--- a/test/src/c.fish
+++ /dev/null
@@ -1,3 +0,0 @@
-for fl in (ls *.cc)
-    g++ $fl -g -o /tmp/$fl.ex -std=c++17 -lr
-end
diff --git a/test/src/os.cc b/test/src/os.cc
index 45dba7edd93ef56bdf06ee14a26e7a9b4ed2cd48..7effc055bb38715aa88ac38a71195c85649e171f 100644
--- a/test/src/os.cc
+++ b/test/src/os.cc
@@ -8,5 +8,4 @@ static_assert(rlib::os_info::os == rlib::os_info::os_t::LINUX);
 static_assert(rlib::os_info::compiler == rlib::os_info::compiler_t::GCC);
 
 int main(){
-
 }