diff --git a/ava.config.js b/ava.config.mjs
similarity index 100%
rename from ava.config.js
rename to ava.config.mjs
diff --git a/examples/napi-compat-mode/__test__/object.spec.ts.snap b/examples/napi-compat-mode/__test__/object.spec.ts.snap
index e16ea220..bfbba2af 100644
Binary files a/examples/napi-compat-mode/__test__/object.spec.ts.snap and b/examples/napi-compat-mode/__test__/object.spec.ts.snap differ
diff --git a/examples/napi-compat-mode/__test__/serde/ser.spec.ts.snap b/examples/napi-compat-mode/__test__/serde/ser.spec.ts.snap
index 66afca61..85e3135b 100644
Binary files a/examples/napi-compat-mode/__test__/serde/ser.spec.ts.snap and b/examples/napi-compat-mode/__test__/serde/ser.spec.ts.snap differ
diff --git a/examples/napi-compat-mode/__test__/string.spec.ts.snap b/examples/napi-compat-mode/__test__/string.spec.ts.snap
index 1bb78848..37ff3527 100644
Binary files a/examples/napi-compat-mode/__test__/string.spec.ts.snap and b/examples/napi-compat-mode/__test__/string.spec.ts.snap differ
diff --git a/examples/napi-compat-mode/__test__/throw.spec.ts b/examples/napi-compat-mode/__test__/throw.spec.ts
index 9a0f97b3..4ecf601e 100644
--- a/examples/napi-compat-mode/__test__/throw.spec.ts
+++ b/examples/napi-compat-mode/__test__/throw.spec.ts
@@ -8,7 +8,7 @@ test('should be able to throw error from native', (t) => {
 
 test('should be able to throw error from native with reason', (t) => {
   const reason = 'Fatal'
-  t.throws(() => bindings.testThrowWithReason(reason), null, reason)
+  t.throws(() => bindings.testThrowWithReason(reason), void 0, reason)
 })
 
 test('should throw if argument type is not match', (t) => {
diff --git a/examples/napi/__test__/typegen.spec.ts.snap b/examples/napi/__test__/typegen.spec.ts.snap
index fbdb529d..1730c624 100644
Binary files a/examples/napi/__test__/typegen.spec.ts.snap and b/examples/napi/__test__/typegen.spec.ts.snap differ
diff --git a/examples/napi/__test__/values.spec.ts b/examples/napi/__test__/values.spec.ts
index c0a010fc..2745b850 100644
--- a/examples/napi/__test__/values.spec.ts
+++ b/examples/napi/__test__/values.spec.ts
@@ -85,7 +85,7 @@ test('number', (t) => {
   t.throws(
     // @ts-expect-error
     () => fibonacci(''),
-    null,
+    void 0,
     'Expect value to be Number, but received String',
   )
 })
@@ -154,7 +154,7 @@ test('class factory', (t) => {
 
   const error = t.throws(() => new ClassWithFactory())
   t.true(
-    error.message.startsWith(
+    error!.message.startsWith(
       'Class contains no `constructor`, can not new it!',
     ),
   )
@@ -178,7 +178,7 @@ test('callback', (t) => {
   t.throws(
     // @ts-expect-error
     () => getCwd(),
-    null,
+    void 0,
     'Expect value to be Function, but received Undefined',
   )
 
@@ -233,7 +233,7 @@ test('Option', (t) => {
 })
 
 test('Result', (t) => {
-  t.throws(() => throwError(), null, 'Manual Error')
+  t.throws(() => throwError(), void 0, 'Manual Error')
 })
 
 test('function ts type override', (t) => {
@@ -337,7 +337,10 @@ test('external', (t) => {
   const ext2 = createExternalString('wtf')
   // @ts-expect-error
   const e = t.throws(() => getExternal(ext2))
-  t.is(e.message, 'T on `get_value_external` is not the type of wrapped object')
+  t.is(
+    e!.message,
+    'T on `get_value_external` is not the type of wrapped object',
+  )
 })
 
 const AbortSignalTest =
@@ -417,7 +420,7 @@ Napi4Test('throw error from thread safe function', async (t) => {
     threadsafeFunctionThrowError(reject)
   })
   const err = await t.throwsAsync(throwPromise)
-  t.is(err.message, 'ThrowFromNative')
+  t.is(err!.message, 'ThrowFromNative')
 })
 
 Napi4Test('resolve value from thread safe function fatal mode', async (t) => {
diff --git a/examples/napi/__test__/values.spec.ts.snap b/examples/napi/__test__/values.spec.ts.snap
index f5678bc0..0575b65e 100644
Binary files a/examples/napi/__test__/values.spec.ts.snap and b/examples/napi/__test__/values.spec.ts.snap differ