diff --git a/t/189-http2-subreq-error-wakeup.t b/t/189-http2-subreq-error-wakeup.t
index 2b6adb6e19..b24a15f989 100644
--- a/t/189-http2-subreq-error-wakeup.t
+++ b/t/189-http2-subreq-error-wakeup.t
@@ -11,15 +11,26 @@
 use Test::Nginx::Socket::Lua;
 use Cwd qw(abs_path realpath);
 use File::Basename;
+use File::Path qw(rmtree);
 
 log_level('info');
 
+my $nginx = $ENV{TEST_NGINX_BINARY} || 'nginx';
+my $nginx_v = eval { `$nginx -V 2>&1` } // '';
+our $HasHttpSlice = $nginx_v =~ /--with-http_slice_module/;
+
 repeat_each(2);
 
-plan tests => repeat_each() * (blocks() * 9 + 2);
+plan tests => repeat_each() * 48;
 
 #no_diff();
+no_shuffle();
 no_long_string();
+
+my $slice_cache_dir = "/tmp/lua-nginx-module-slice-cache-" . server_port();
+rmtree($slice_cache_dir);
+add_cleanup_handler(sub { rmtree($slice_cache_dir) });
+
 run_tests();
 
 __DATA__
@@ -218,3 +229,98 @@ Fast parent completed
 --- no_error_log
 [alert]
 [crit]
+[emerg]
+[error]
+--- no_shutdown_error_log
+[alert]
+[crit]
+[emerg]
+[error]
+
+
+
+=== TEST 5: warm slice cache for HTTP/2 slow client
+--- skip_eval: 4: !$::HasHttpSlice
+--- http_config
+    send_timeout 5s;
+    proxy_cache_path /tmp/lua-nginx-module-slice-cache-$TEST_NGINX_SERVER_PORT levels=1:2 keys_zone=SLICES:10m inactive=10m max_size=20m;
+
+--- user_files eval
+">>> origin/big.bin\n" . ("x" x (10 * 1024 * 1024))
+
+--- config
+    location = /slice-big.bin {
+        slice 1m;
+        proxy_cache SLICES;
+        proxy_cache_key "$uri $slice_range";
+        proxy_set_header Range $slice_range;
+        proxy_cache_valid 200 206 1h;
+        proxy_pass http://127.0.0.1:$TEST_NGINX_SERVER_PORT/origin/big.bin;
+    }
+
+    location /origin/ {
+        root $TEST_NGINX_SERVER_ROOT/html;
+    }
+
+--- http2
+--- request
+GET /slice-big.bin
+--- ignore_response
+--- no_error_log
+[alert]
+[crit]
+[emerg]
+[error]
+--- no_shutdown_error_log
+[alert]
+[crit]
+[emerg]
+[error]
+
+
+
+=== TEST 6: HTTP/2 slow client with warmed slice cache
+--- skip_eval: 4: !$::HasHttpSlice
+--- http_config
+    send_timeout 5s;
+    proxy_cache_path /tmp/lua-nginx-module-slice-cache-$TEST_NGINX_SERVER_PORT levels=1:2 keys_zone=SLICES:10m inactive=10m max_size=20m;
+
+--- user_files eval
+">>> origin/big.bin\n" . ("x" x (10 * 1024 * 1024)) . "\n" .
+">>> curl-slow.conf\n" .
+"limit-rate = \"50k\"\n" .
+"max-time = 8\n" .
+"output = \"/dev/null\"\n"
+
+--- config
+    location = /slice-big.bin {
+        slice 1m;
+        proxy_cache SLICES;
+        proxy_cache_key "$uri $slice_range";
+        proxy_set_header Range $slice_range;
+        proxy_cache_valid 200 206 1h;
+        proxy_pass http://127.0.0.1:$TEST_NGINX_SERVER_PORT/origin/big.bin;
+    }
+
+    location /origin/ {
+        root $TEST_NGINX_SERVER_ROOT/html;
+    }
+
+--- http2
+--- request
+GET /slice-big.bin
+--- timeout: 12
+--- ignore_response
+--- curl_options: --config=t/servroot/html/curl-slow.conf
+--- curl_error eval: qr/\((28|92)\)/
+--- wait: 6
+--- no_error_log
+[alert]
+[crit]
+[emerg]
+[error]
+--- no_shutdown_error_log
+[alert]
+[crit]
+[emerg]
+[error]
diff --git a/util/build-with-dd.sh b/util/build-with-dd.sh
index 4f4e785f53..c13c2f75c1 100755
--- a/util/build-with-dd.sh
+++ b/util/build-with-dd.sh
@@ -19,6 +19,7 @@ time ngx-build $force $version \
             --with-cc-opt="-DNGX_LUA_USE_ASSERT -I$PCRE2_INC -I$OPENSSL_INC -DDDEBUG=1" \
             --with-http_v2_module \
             --with-http_v3_module \
+            --with-http_slice_module \
             --with-http_realip_module \
             --with-http_ssl_module \
             --add-module=$root/../ndk-nginx-module \
diff --git a/util/build-without-ssl.sh b/util/build-without-ssl.sh
index 022d9617e2..715e740b9d 100755
--- a/util/build-without-ssl.sh
+++ b/util/build-without-ssl.sh
@@ -19,6 +19,7 @@ time ngx-build $force $version \
             --with-ipv6 \
             --with-cc-opt="-DNGX_LUA_USE_ASSERT -I$PCRE2_INC" \
             --with-http_v2_module \
+            --with-http_slice_module \
             --with-http_realip_module \
             --add-module=$root/../ndk-nginx-module \
             --add-module=$root/../set-misc-nginx-module \
diff --git a/util/build.sh b/util/build.sh
index cd4eaa45f4..39aa7d688c 100755
--- a/util/build.sh
+++ b/util/build.sh
@@ -33,6 +33,7 @@ time ngx-build $force $version \
           --with-cc-opt="-DNGX_LUA_USE_ASSERT -I$PCRE2_INC -I$OPENSSL_INC" \
           --with-http_v2_module \
           --with-http_v3_module \
+          --with-http_slice_module \
           --with-http_realip_module \
           --with-http_ssl_module \
           --add-module=$root/../ndk-nginx-module \