diff --git a/src/deps/src/lua-resty-signal/t/TestKiller.pm b/src/deps/src/lua-resty-signal/t/TestKiller.pm
deleted file mode 100644
index 5599944a1..000000000
--- a/src/deps/src/lua-resty-signal/t/TestKiller.pm
+++ /dev/null
@@ -1,32 +0,0 @@
-package t::TestKiller;
-
-use v5.10.1;
-use Test::Nginx::Socket::Lua -Base;
-
-add_block_preprocessor(sub {
-    my $block = shift;
-
-    my $http_config = $block->http_config // '';
-    my $init_by_lua_block = $block->init_by_lua_block // 'require "resty.core"';
-
-    $http_config .= <<_EOC_;
-
-    lua_package_path "./lib/?.lua;../lua-resty-core/lib/?.lua;../lua-resty-lrucache/lib/?.lua;;";
-    lua_package_cpath "./?.so;;";
-    init_by_lua_block {
-        $init_by_lua_block
-    }
-_EOC_
-
-    $block->set_value("http_config", $http_config);
-
-    if (!defined $block->error_log) {
-        $block->set_value("no_error_log", "[error]");
-    }
-
-    if (!defined $block->request) {
-        $block->set_value("request", "GET /t");
-    }
-});
-
-1;
diff --git a/src/deps/src/lua-resty-signal/t/kill.t b/src/deps/src/lua-resty-signal/t/kill.t
deleted file mode 100644
index 6b0d6171f..000000000
--- a/src/deps/src/lua-resty-signal/t/kill.t
+++ /dev/null
@@ -1,207 +0,0 @@
-# vi:ft=
-
-use lib '.';
-use t::TestKiller;
-
-plan tests => 3 * blocks();
-
-no_long_string();
-#no_diff();
-
-run_tests();
-
-__DATA__
-
-=== TEST 1: returns an error if signal is unknown
---- config
-    location = /t {
-        content_by_lua_block {
-            local resty_signal = require "resty.signal"
-
-            local ok, err = resty_signal.kill(pid, "FOO")
-            if not ok then
-                ngx.say("failed to send FOO signal: ", err)
-                return
-            end
-            ngx.say("ok")
-        }
-    }
---- response_body
-failed to send FOO signal: unknown signal name
-
-
-
-=== TEST 2: send NONE to a non-existing process
---- config
-    location = /t {
-        content_by_lua_block {
-            local resty_signal = require "resty.signal"
-
-            local say = ngx.say
-            local ngx_pipe = require "ngx.pipe"
-            local proc = assert(ngx_pipe.spawn("echo ok"))
-            local pid = assert(proc:pid())
-            assert(proc:wait())
-
-            local ok, err = resty_signal.kill(pid, "NONE")
-            if not ok then
-                ngx.say("failed to send NONE signal: ", err)
-                return
-            end
-            ngx.say("ok")
-        }
-    }
---- response_body
-failed to send NONE signal: No such process
-
-
-
-=== TEST 3: send TERM to a non-existing process
---- config
-    location = /t {
-        content_by_lua_block {
-            local resty_signal = require "resty.signal"
-
-            local say = ngx.say
-            local ngx_pipe = require "ngx.pipe"
-            local proc = assert(ngx_pipe.spawn("echo ok"))
-            local pid = assert(proc:pid())
-            assert(proc:wait())
-
-            local ok, err = resty_signal.kill(pid, "TERM")
-            if not ok then
-                ngx.say("failed to send TERM signal: ", err)
-                return
-            end
-            ngx.say("ok")
-        }
-    }
---- response_body
-failed to send TERM signal: No such process
-
-
-
-=== TEST 4: send NONE to an existing process
---- config
-    location = /t {
-        content_by_lua_block {
-            local resty_signal = require "resty.signal"
-
-            local say = ngx.say
-            local ngx_pipe = require "ngx.pipe"
-            local proc = assert(ngx_pipe.spawn("echo ok"))
-            local pid = assert(proc:pid())
-            -- assert(proc:wait())
-
-            for i = 1, 2 do
-                ngx.say("i = ", i)
-                local ok, err = resty_signal.kill(pid, "NONE")
-                if not ok then
-                    ngx.say("failed to send NONE signal: ", err)
-                    return
-                end
-            end
-
-            ngx.say("ok")
-        }
-    }
---- response_body
-i = 1
-i = 2
-ok
-
-
-
-=== TEST 5: send TERM to an existing process
---- config
-    location = /t {
-        content_by_lua_block {
-            local resty_signal = require "resty.signal"
-
-            local say = ngx.say
-            local ngx_pipe = require "ngx.pipe"
-            local proc = assert(ngx_pipe.spawn("echo ok"))
-            local pid = assert(proc:pid())
-            -- assert(proc:wait())
-
-            for i = 1, 2 do
-                ngx.say("i = ", i)
-                local ok, err = resty_signal.kill(pid, "TERM")
-                if not ok then
-                    ngx.say("failed to send TERM signal: ", err)
-                    return
-                end
-                ngx.sleep(0.01)
-            end
-
-            ngx.say("ok")
-        }
-    }
---- response_body
-i = 1
-i = 2
-failed to send TERM signal: No such process
-
-
-
-=== TEST 6: send KILL to an existing process
---- config
-    location = /t {
-        content_by_lua_block {
-            local resty_signal = require "resty.signal"
-
-            local say = ngx.say
-            local ngx_pipe = require "ngx.pipe"
-            local proc = assert(ngx_pipe.spawn("echo ok"))
-            local pid = assert(proc:pid())
-            -- assert(proc:wait())
-
-            for i = 1, 2 do
-                ngx.say("i = ", i)
-                local ok, err = resty_signal.kill(pid, "KILL")
-                if not ok then
-                    ngx.say("failed to send KILL signal: ", err)
-                    return
-                end
-                ngx.sleep(0.01)
-            end
-
-            ngx.say("ok")
-        }
-    }
---- response_body
-i = 1
-i = 2
-failed to send KILL signal: No such process
-
-
-
-=== TEST 7: send TERM signal value, 15, directly to an existing process
---- config
-    location = /t {
-        content_by_lua_block {
-            local resty_signal = require "resty.signal"
-
-            local say = ngx.say
-            local ngx_pipe = require "ngx.pipe"
-            local proc = assert(ngx_pipe.spawn("echo ok"))
-            local pid = assert(proc:pid())
-            -- assert(proc:wait())
-
-            for i = 1, 2 do
-                ngx.say("i = ", i)
-                local ok, err = resty_signal.kill(pid, 15)
-                if not ok then
-                    ngx.say("failed to send TERM signal: ", err)
-                    return
-                end
-                ngx.sleep(0.01)
-            end
-
-            ngx.say("ok")
-        }
-    }
---- response_body
-i = 1
-i = 2
-failed to send TERM signal: No such process
diff --git a/src/deps/src/lua-resty-signal/t/sanity.t b/src/deps/src/lua-resty-signal/t/sanity.t
deleted file mode 100644
index 07e2cee7a..000000000
--- a/src/deps/src/lua-resty-signal/t/sanity.t
+++ /dev/null
@@ -1,35 +0,0 @@
-# vi:ft=
-
-use lib '.';
-use t::TestKiller;
-
-plan tests => 3 * blocks();
-
-no_long_string();
-#no_diff();
-
-run_tests();
-
-__DATA__
-
-=== TEST 1: failure to load librestysignal.so
---- config
-    location = /t {
-        content_by_lua_block {
-            local cpath = package.cpath
-            package.cpath = "/foo/?.so;/bar/?.so;"
-
-            local ok, perr = pcall(require, "resty.signal")
-            if not ok then
-                ngx.say(perr)
-            end
-
-            package.cpath = cpath
-        }
-    }
---- response_body
-could not load librestysignal.so from the following paths:
-/foo/librestysignal.so
-/bar/librestysignal.so
---- no_error_log
-[error]
diff --git a/src/deps/src/lua-resty-signal/t/signum.t b/src/deps/src/lua-resty-signal/t/signum.t
deleted file mode 100644
index 3d7b94b10..000000000
--- a/src/deps/src/lua-resty-signal/t/signum.t
+++ /dev/null
@@ -1,116 +0,0 @@
-# vi:ft=
-
-use lib '.';
-use t::TestKiller;
-
-plan tests => 3 * blocks();
-
-no_long_string();
-#no_diff();
-
-run_tests();
-
-__DATA__
-
-=== TEST 1: signals whose values are specified by POSIX
---- config
-    location = /t {
-        content_by_lua_block {
-            local resty_signal = require "resty.signal"
-            local ffi = require "ffi"
-            local say = ngx.say
-            local signum = resty_signal.signum
-
-            for i, signame in ipairs{ "ABRT", "ALRM", "HUP", "INT", "KILL",
-                                      "QUIT", "TERM", "TRAP", "BLAH" } do
-                say(signame, ": ", tostring(signum(signame)))
-            end
-
-            local linux_signals = {
-                NONE = 0,
-                HUP = 1,
-                INT = 2,
-                QUIT = 3,
-                ILL = 4,
-                TRAP = 5,
-                ABRT = 6,
-                BUS = 7,
-                FPE = 8,
-                KILL = 9,
-                USR1 = 10,
-                SEGV = 11,
-                USR2 = 12,
-                PIPE = 13,
-                ALRM = 14,
-                TERM = 15,
-                CHLD = 17,
-                CONT = 18,
-                STOP = 19,
-                TSTP = 20,
-                TTIN = 21,
-                TTOU = 22,
-                URG = 23,
-                XCPU = 24,
-                XFSZ = 25,
-                VTALRM = 26,
-                PROF = 27,
-                WINCH = 28,
-                IO = 29,
-                PWR = 30
-            }
-
-            local macosx_signals = {
-                HUP = 1,
-                INT = 2,
-                QUIT = 3,
-                ILL = 4,
-                TRAP = 5,
-                ABRT = 6,
-                EMT = 7,
-                FPE = 8,
-                KILL = 9,
-                BUS = 10,
-                SEGV = 11,
-                SYS = 12,
-                PIPE = 13,
-                ALRM = 14,
-                TERM = 15,
-                URG = 16,
-                STOP = 17,
-                TSTP = 18,
-                CONT = 19,
-                CHLD = 20,
-                TTIN = 21,
-                TTOU = 22,
-                IO = 23,
-                XCPU = 24,
-                XFSZ = 25,
-                VTALRM = 26,
-                PROF = 27,
-                WINCH = 28,
-                INFO = 29,
-                USR1 = 30,
-                USR2 = 31
-            }
-
-            if ffi.os == "Linux" then
-                for signame, num in pairs(linux_signals) do
-                    assert(num == tonumber(signum(signame)))
-                end
-            elseif ffi.os == "OSX" then
-                for signame, num in pairs(macosx_signals) do
-                    assert(num == tonumber(signum(signame)))
-                end
-            end
-        }
-    }
---- response_body
-ABRT: 6
-ALRM: 14
-HUP: 1
-INT: 2
-KILL: 9
-QUIT: 3
-TERM: 15
-TRAP: 5
-BLAH: nil