diff --git a/annotator-core/src/test/java/edu/ucr/cs/riple/core/CoreTest.java b/annotator-core/src/test/java/edu/ucr/cs/riple/core/CoreTest.java
index 58373c509..9ce6cc946 100644
--- a/annotator-core/src/test/java/edu/ucr/cs/riple/core/CoreTest.java
+++ b/annotator-core/src/test/java/edu/ucr/cs/riple/core/CoreTest.java
@@ -556,4 +556,23 @@ public void nestedParameters() {
         .toDepth(1)
         .start();
   }
+
+  @Test
+  public void nonnullTypeUseAnnotationOnFormalParameterAcknowledgmentTest() {
+    coreTestHelper
+        .onTarget()
+        .withSourceLines(
+            "A.java",
+            "package test;",
+            "import org.jetbrains.annotations.NotNull;",
+            "public class A {",
+            "  static void foo(@NotNull Object o) {}",
+            "  static void bar() { foo(null); }",
+            "}")
+        .expectNoReport()
+        .toDepth(5)
+        .start();
+    // No annotation should be added even though it can reduce the number of errors.
+    Assert.assertEquals(coreTestHelper.getLog().getInjectedAnnotations().size(), 0);
+  }
 }
diff --git a/annotator-core/src/test/resources/templates/nullable-multi-modular/build.gradle b/annotator-core/src/test/resources/templates/nullable-multi-modular/build.gradle
index c4c50a559..ab8094733 100644
--- a/annotator-core/src/test/resources/templates/nullable-multi-modular/build.gradle
+++ b/annotator-core/src/test/resources/templates/nullable-multi-modular/build.gradle
@@ -53,6 +53,8 @@ subprojects {
 
         // to add @Initializer
         compileOnly 'com.uber.nullaway:nullaway-annotations:0.10.10'
+        // to add jetbrains annotations (testing type use vs type declaration)
+        compileOnly 'org.jetbrains:annotations:24.0.0'
         compileOnly "org.jspecify:jspecify:0.3.0"
         compileOnly "com.google.code.findbugs:jsr305:3.0.2"
         errorprone "com.google.errorprone:error_prone_core:2.3.2"
diff --git a/annotator-scanner/src/main/java/edu/ucr/cs/riple/scanner/location/MethodParameterLocation.java b/annotator-scanner/src/main/java/edu/ucr/cs/riple/scanner/location/MethodParameterLocation.java
index d62d6b8c8..9bc5e9fcf 100644
--- a/annotator-scanner/src/main/java/edu/ucr/cs/riple/scanner/location/MethodParameterLocation.java
+++ b/annotator-scanner/src/main/java/edu/ucr/cs/riple/scanner/location/MethodParameterLocation.java
@@ -24,6 +24,7 @@
 
 import com.google.common.base.Preconditions;
 import com.sun.tools.javac.code.Symbol;
+import edu.ucr.cs.riple.scanner.Serializer;
 import javax.lang.model.element.ElementKind;
 
 /**
@@ -66,8 +67,8 @@ public String tabSeparatedToString() {
         "\t",
         type.toString(),
         enclosingClass.flatName(),
-        enclosingMethod.toString(),
-        paramSymbol.toString(),
+        Serializer.serializeSymbol(enclosingMethod),
+        Serializer.serializeSymbol(paramSymbol),
         String.valueOf(index),
         path != null ? path.toString() : "null");
   }