diff --git a/pom.xml b/pom.xml
index 3f7cc7e3..c2ee1230 100644
--- a/pom.xml
+++ b/pom.xml
@@ -122,8 +122,8 @@ http://maven.apache.org/maven-v4_0_0.xsd">
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
 				<configuration>
-					<source>17</source>
-					<target>17</target>
+					<source>18</source>
+					<target>18</target>
                     <compilerArgs>--enable-preview</compilerArgs>
                 </configuration>
 			</plugin>
diff --git a/src/test/java/targetast/TphTest.java b/src/test/java/targetast/TphTest.java
index c2bb9835..198bea5b 100644
--- a/src/test/java/targetast/TphTest.java
+++ b/src/test/java/targetast/TphTest.java
@@ -18,6 +18,9 @@ public class TphTest {
 		var classFiles = TestCodegen.generateClassFiles("Tph.jav", new ByteArrayClassLoader());
 		classToTest = classFiles.get("Tph");
 		instanceOfClass = classToTest.getDeclaredConstructor().newInstance();
+		classFiles = TestCodegen.generateClassFiles("Tph7.jav", new ByteArrayClassLoader());
+		classToTest = classFiles.get("Tph7");
+		instanceOfClass = classToTest.getDeclaredConstructor().newInstance();
 	}
 
 	@Test
diff --git a/src/test/resources/bytecode/javFiles/Tph.jav b/src/test/resources/bytecode/javFiles/Tph.jav
index 9faa570c..3f9d0aab 100644
--- a/src/test/resources/bytecode/javFiles/Tph.jav
+++ b/src/test/resources/bytecode/javFiles/Tph.jav
@@ -3,7 +3,6 @@ public class Tph {
 	m(a,b){
 		var c = m2(b);
 		return a;
-//		return m2(b);
 	}
 	
 	m2(b){
diff --git a/src/test/resources/bytecode/javFiles/Tph7.jav b/src/test/resources/bytecode/javFiles/Tph7.jav
new file mode 100644
index 00000000..cc55afb5
--- /dev/null
+++ b/src/test/resources/bytecode/javFiles/Tph7.jav
@@ -0,0 +1,11 @@
+public class Tph7 {
+
+	m(a,b){
+		var c = m2(b);
+		return m2(b);
+	}
+
+	m2(b){
+		return b;
+	}
+}
\ No newline at end of file