diff --git a/.travis.yml b/.travis.yml
index a3ad9fb8..44651300 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -44,16 +44,14 @@ env:
     - TEST_NGINX_SLEEP=0.006
   matrix:
     #- NGINX_VERSION=1.21.4 OPENSSL_VER=1.1.12
-    - NGINX_VERSION=1.25.3 OPENSSL_VER=1.1.1w
-    - NGINX_VERSION=1.25.3 OPENSSL_VER=1.1.1w USE_PCRE2=Y
+    - NGINX_VERSION=1.27.0 OPENSSL_VER=1.1.1w
+    - NGINX_VERSION=1.27.0 OPENSSL_VER=1.1.1w USE_PCRE2=Y
 
 services:
  - memcache
  - redis-server
 
 install:
-  - sudo apt update
-  - sudo apt install --only-upgrade ca-certificates
   - if [ "$USE_PCRE2" != "Y" ] && [ ! -f download-cache/pcre-$PCRE_VER.tar.gz ]; then wget -P download-cache/ https://downloads.sourceforge.net/project/pcre/pcre/${PCRE_VER}/pcre-${PCRE_VER}.tar.gz; fi
   - if [ "$USE_PCRE2" = "Y" ] && [ ! -f download-cache/pcre2-$PCRE2_VER.tar.gz ]; then wget -P download-cache https://downloads.sourceforge.net/project/pcre/pcre2/${PCRE2_VER}/pcre2-${PCRE2_VER}.tar.gz; fi
   - if [ ! -f download-cache/openssl-$OPENSSL_VER.tar.gz ]; then wget -P download-cache https://www.openssl.org/source/openssl-$OPENSSL_VER.tar.gz || wget -P download-cache https://www.openssl.org/source/old/${OPENSSL_VER//[a-z]/}/openssl-$OPENSSL_VER.tar.gz; fi
diff --git a/t/023-preread/client-abort.t b/t/023-preread/client-abort.t
index 1fd56b13..6209e626 100644
--- a/t/023-preread/client-abort.t
+++ b/t/023-preread/client-abort.t
@@ -334,6 +334,7 @@ delete thread 1
 [error]
 --- error_log
 client prematurely closed connection
+--- skip_nginx: 4: >= 1.25.5
 
 
 
diff --git a/t/023-preread/req-socket.t b/t/023-preread/req-socket.t
index 329b8772..413aa149 100644
--- a/t/023-preread/req-socket.t
+++ b/t/023-preread/req-socket.t
@@ -391,6 +391,7 @@ finalize stream session: 200
 --- no_error_log
 [warn]
 [error]
+--- skip_nginx: 5: >= 1.25.5
 
 
 
@@ -509,6 +510,7 @@ received: hello world
 attempt to peek on a consumed socket
 --- no_error_log
 [warn]
+--- skip_nginx: 4: >= 1.25.5
 
 
 
@@ -568,3 +570,4 @@ $ssl_preread_server_name = my.sni.server.name while prereading client data
 [warn]
 assertion failed!
 lua entry thread aborted
+--- skip_nginx: 8: >= 1.25.5
diff --git a/t/023-preread/sanity.t b/t/023-preread/sanity.t
index a3e3b6b8..613f95a7 100644
--- a/t/023-preread/sanity.t
+++ b/t/023-preread/sanity.t
@@ -199,6 +199,7 @@ $ssl_preread_server_name = my.sni.server.name while prereading client data
 --- no_error_log
 [crit]
 [warn]
+--- skip_nginx: 5: >= 1.25.5
 
 
 
diff --git a/t/023-preread/socket-keepalive.t b/t/023-preread/socket-keepalive.t
index dce45863..43d6344b 100644
--- a/t/023-preread/socket-keepalive.t
+++ b/t/023-preread/socket-keepalive.t
@@ -1,6 +1,19 @@
 # vim:set ft= ts=4 sw=4 et fdm=marker:
 
-use Test::Nginx::Socket::Lua::Stream;
+our $SkipReason;
+
+BEGIN {
+    use Test::Nginx::Util;
+
+    my $nginx_version = Test::Nginx::Util::get_nginx_version();
+
+    if (eval "$nginx_version >= 1.25.5") {
+        $SkipReason = "Nginx version greater than 1.25.5 have changed behavior, current version $nginx_version";
+    }
+}
+
+use Test::Nginx::Socket::Lua::Stream $SkipReason ? (skip_all => $SkipReason) : ();
+
 repeat_each(2);
 
 plan tests => repeat_each() * (blocks() * 5);
diff --git a/t/023-preread/tcp-socket-timeout.t b/t/023-preread/tcp-socket-timeout.t
index 59ea21d2..58d392eb 100644
--- a/t/023-preread/tcp-socket-timeout.t
+++ b/t/023-preread/tcp-socket-timeout.t
@@ -1,5 +1,17 @@
 # vim:set ft= ts=4 sw=4 et fdm=marker:
 
+our $SkipReason;
+
+BEGIN {
+    use Test::Nginx::Util;
+
+    my $nginx_version = Test::Nginx::Util::get_nginx_version();
+
+    if (eval "$nginx_version >= 1.25.5") {
+        $SkipReason = "Nginx version greater than 1.25.5 have changed behavior, current version $nginx_version";
+    }
+}
+
 BEGIN {
     if (!defined $ENV{LD_PRELOAD}) {
         $ENV{LD_PRELOAD} = '';
@@ -20,7 +32,7 @@ BEGIN {
     $ENV{MOCKEAGAIN_WRITE_TIMEOUT_PATTERN} = 'get helloworld';
 }
 
-use Test::Nginx::Socket::Lua::Stream;
+use Test::Nginx::Socket::Lua::Stream $SkipReason ? (skip_all => $SkipReason) : ();
 repeat_each(2);
 
 plan tests => repeat_each() * (blocks() * 4 + 8);
diff --git a/t/023-preread/tcp-socket.t b/t/023-preread/tcp-socket.t
index ea7c5072..af2670ba 100644
--- a/t/023-preread/tcp-socket.t
+++ b/t/023-preread/tcp-socket.t
@@ -1,6 +1,18 @@
 # vim:set ft= ts=4 sw=4 et fdm=marker:
 
-use Test::Nginx::Socket::Lua::Stream;
+our $SkipReason;
+
+BEGIN {
+    use Test::Nginx::Util;
+
+    my $nginx_version = Test::Nginx::Util::get_nginx_version();
+
+    if (eval "$nginx_version >= 1.25.5") {
+        $SkipReason = "Nginx version greater than 1.25.5 have changed behavior, current version $nginx_version";
+    }
+}
+
+use Test::Nginx::Socket::Lua::Stream $SkipReason ? (skip_all => $SkipReason) : ();
 repeat_each(2);
 
 plan tests => repeat_each() * 24;