diff --git a/assertj-core/pom.xml b/assertj-core/pom.xml
index e33197a47f..e08cd5bdf5 100644
--- a/assertj-core/pom.xml
+++ b/assertj-core/pom.xml
@@ -314,27 +314,14 @@
         <configuration>
           <showDeprecation>true</showDeprecation>
           <showWarnings>true</showWarnings>
+          <useModulePath>false</useModulePath> <!-- FIXME #3446 -->
         </configuration>
-        <executions>
-          <execution>
-            <id>jdk9</id>
-            <goals>
-              <goal>compile</goal>
-            </goals>
-            <configuration>
-              <release>9</release>
-              <compileSourceRoots>
-                <compileSourceRoot>${project.basedir}/src/main/java9</compileSourceRoot>
-              </compileSourceRoots>
-              <multiReleaseOutput>true</multiReleaseOutput>
-            </configuration>
-          </execution>
-        </executions>
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
+          <useModulePath>false</useModulePath> <!-- FIXME #3446 -->
           <trimStackTrace>false</trimStackTrace>
           <excludes>
             <exclude>org/assertj/core/internal/objects/Objects_assertHasOnlyFields_Test*</exclude>
@@ -417,6 +404,9 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
+        <configuration>
+          <legacyMode>true</legacyMode> <!-- FIXME #3446 -->
+        </configuration>
       </plugin>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
diff --git a/assertj-core/src/main/java9/module-info.java b/assertj-core/src/main/java/module-info.java
similarity index 100%
rename from assertj-core/src/main/java9/module-info.java
rename to assertj-core/src/main/java/module-info.java
diff --git a/assertj-parent/pom.xml b/assertj-parent/pom.xml
index ac75601a2b..30873df3f5 100644
--- a/assertj-parent/pom.xml
+++ b/assertj-parent/pom.xml
@@ -16,11 +16,9 @@
 
   <properties>
     <additionalparam>-Xdoclint:none</additionalparam>
-    <java.version>8</java.version>
+    <java.version>17</java.version>
     <maven.compiler.parameters>true</maven.compiler.parameters>
     <maven.compiler.release>${java.version}</maven.compiler.release>
-    <maven.compiler.source>${java.version}</maven.compiler.source>
-    <maven.compiler.target>${java.version}</maven.compiler.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <spotless.skip>true</spotless.skip>