diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 888d6cfc470..0a11222c4a1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-22.04 ]
-        jdk: [ 17.0.10, 21.0.2 ]
+        jdk: [ 17.0.10, 21.0.2, 22.0.2 ]
         distribution: [ temurin ]
         experimental: [ false ]
         include:
diff --git a/refaster-compiler/src/main/java/tech/picnic/errorprone/refaster/plugin/RefasterRuleCompilerTaskListener.java b/refaster-compiler/src/main/java/tech/picnic/errorprone/refaster/plugin/RefasterRuleCompilerTaskListener.java
index dbef9d0e44e..e9cd1a4461a 100644
--- a/refaster-compiler/src/main/java/tech/picnic/errorprone/refaster/plugin/RefasterRuleCompilerTaskListener.java
+++ b/refaster-compiler/src/main/java/tech/picnic/errorprone/refaster/plugin/RefasterRuleCompilerTaskListener.java
@@ -21,7 +21,6 @@
 import com.sun.tools.javac.code.Symbol.PackageSymbol;
 import com.sun.tools.javac.main.JavaCompiler;
 import com.sun.tools.javac.util.Context;
-import com.sun.tools.javac.util.Name;
 import java.io.IOException;
 import java.io.ObjectOutput;
 import java.io.ObjectOutputStream;
@@ -137,10 +136,10 @@ private static String toPackageName(ClassSymbol symbol) {
     return enclosingPackage == null ? "" : enclosingPackage.toString();
   }
 
-  private static CharSequence toSimpleFlatName(ClassSymbol symbol) {
-    Name flatName = symbol.flatName();
+  private static String toSimpleFlatName(ClassSymbol symbol) {
+    String flatName = symbol.flatName().toString();
     int lastDot = flatName.lastIndexOf((byte) '.');
-    return lastDot < 0 ? flatName : flatName.subSequence(lastDot + 1, flatName.length());
+    return lastDot < 0 ? flatName : flatName.substring(lastDot + 1);
   }
 
   private static void outputCodeTransformer(CodeTransformer codeTransformer, FileObject target)