diff --git a/src/test/java/com/android/tools/r8/compatproguard/reflection/ReflectionTest.java b/src/test/java/com/android/tools/r8/compatproguard/reflection/ReflectionTest.java
index 90993ee..6a1e059 100644
--- a/src/test/java/com/android/tools/r8/compatproguard/reflection/ReflectionTest.java
+++ b/src/test/java/com/android/tools/r8/compatproguard/reflection/ReflectionTest.java
@@ -48,6 +48,8 @@
     Method m;
     m = A.class.getMethod("method0");
     m.invoke(a);
+    // The call with in-exact argument to getMethod is intended and should stay.
+    // The warning cannot be suppressed according to b/117198454.
     m = A.class.getMethod("method0", null);
     m.invoke(a);
     m = A.class.getMethod("method0", (Class<?>[]) null);
diff --git a/src/test/java/com/android/tools/r8/resolution/packageprivate/PackagePrivateReentryWithNarrowingTest.java b/src/test/java/com/android/tools/r8/resolution/packageprivate/PackagePrivateReentryWithNarrowingTest.java
index 48df2f4..068e45d 100644
--- a/src/test/java/com/android/tools/r8/resolution/packageprivate/PackagePrivateReentryWithNarrowingTest.java
+++ b/src/test/java/com/android/tools/r8/resolution/packageprivate/PackagePrivateReentryWithNarrowingTest.java
@@ -110,7 +110,7 @@
 
   private byte[] getDWithPackagePrivateFoo() throws NoSuchMethodException, IOException {
     return transformer(D.class)
-        .setAccessFlags(D.class.getDeclaredMethod("bar", null), m -> m.unsetPublic())
+        .setAccessFlags(D.class.getDeclaredMethod("bar"), m -> m.unsetPublic())
         .transform();
   }
 
diff --git a/src/test/java/com/android/tools/r8/shaking/desugar/interfacemethods/BridgeInliningTest.java b/src/test/java/com/android/tools/r8/shaking/desugar/interfacemethods/BridgeInliningTest.java
index af204ec..5f6a618 100644
--- a/src/test/java/com/android/tools/r8/shaking/desugar/interfacemethods/BridgeInliningTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/desugar/interfacemethods/BridgeInliningTest.java
@@ -31,7 +31,7 @@
   public static void main(String[] args) throws Exception {
     C obj = new C();
     for (Method m : obj.getClass().getDeclaredMethods()) {
-      m.invoke(obj, null);
+      m.invoke(obj);
     }
   }
 }