verify no JDK 23

pom.xml

@@ -96,6 +96,7 @@ SOFTWARE.
   <properties>
     <timestamp>${maven.build.timestamp}</timestamp>
     <jdk.version>1.8</jdk.version>
+    <maven.compiler.proc>full</maven.compiler.proc>
     <argLine/>
   </properties>
   <dependencies>
@@ -372,6 +373,24 @@ SOFTWARE.
       </testResource>
     </testResources>
     <plugins>
+      <plugin>
+        <artifactId>maven-enforcer-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>enforce-jdk-version</id>
+            <goals>
+              <goal>enforce</goal>
+            </goals>
+            <configuration>
+              <rules>
+                <requireJavaVersion>
+                  <version>[11,23)</version>
+                </requireJavaVersion>
+              </rules>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <artifactId>maven-assembly-plugin</artifactId>
         <executions>

src/it/file-manager/src/verifier/verifications.xml

@@ -26,7 +26,7 @@ SOFTWARE.
   <files>
     <file>
       <location>LICENSE.txt</location>
-      <contains>2014-2024</contains>
+      <contains>2014-2025</contains>
     </file>
   </files>
 </verifications>

src/test/java/org/takes/facets/fork/FkHitRefreshTest.java

@@ -54,7 +54,7 @@ void refreshesOnDemand(@TempDir final Path temp) throws Exception {
             () -> done.set(true),
             new TkEmpty()
         );
-        TimeUnit.SECONDS.sleep(2L);
+        TimeUnit.MILLISECONDS.sleep(10L);
         FileUtils.touch(temp.resolve("hey.txt").toFile());
         MatcherAssert.assertThat(
             fork.route(req).has(),

src/test/java/org/takes/http/BkTimeableTest.java

@@ -57,7 +57,7 @@ void stopsLongRunningBack(@TempDir final File temp) throws Exception {
         final Take take = req -> {
             Response rsp;
             try {
-                TimeUnit.SECONDS.sleep(10L);
+                TimeUnit.SECONDS.sleep(10_000L);
                 rsp = new RsText("finish");
             } catch (final InterruptedException ex) {
                 Thread.currentThread().interrupt();

src/test/resources/junit-platform.properties

@@ -0,0 +1,25 @@
+#
+# The MIT License (MIT)
+#
+# Copyright (c) 2014-2025 Yegor Bugayenko
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+
+junit.jupiter.execution.timeout.test.method.default = 10s

src/test/resources/log4j.properties

@@ -28,5 +28,7 @@ log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
 log4j.appender.CONSOLE.layout=com.jcabi.log.MulticolorLayout
 log4j.appender.CONSOLE.layout.ConversionPattern=[%color{%p}] %t %c: %m%n
 
-log4j.logger.org.takes=DEBUG
-log4j.logger.com.jcabi.http=INFO
+log4j.logger.org.takes=WARN
+log4j.logger.com.jcabi.http=WARN
+log4j.logger.org.apache.velocity=WARN
+log4j.logger.org.takes.facets.fallback.FbLog4j=ERROR

src/test/resources/logback.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+The MIT License (MIT)
+
+Copyright (c) 2014-2025 Yegor Bugayenko
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+-->
+<configuration>
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%highlight(%-5level) %logger{15} - %msg%n</pattern>
+    </encoder>
+  </appender>
+  <root level="WARN">
+    <appender-ref ref="STDOUT"/>
+  </root>
+  <logger name="org.takes" level="WARN"/>
+</configuration>

src/verifier/verifications.xml

@@ -26,7 +26,7 @@ SOFTWARE.
   <files>
     <file>
       <location>LICENSE.txt</location>
-      <contains>2014-2024</contains>
+      <contains>2014-2025</contains>
     </file>
   </files>
 </verifications>