diff --git a/test/addons-napi/test_error/test_error.c b/test/addons-napi/test_error/test_error.c
index c9ac7a425fae76..52a9ac7956954e 100644
--- a/test/addons-napi/test_error/test_error.c
+++ b/test/addons-napi/test_error/test_error.c
@@ -1,7 +1,7 @@
 #include <node_api.h>
 #include "../common.h"
 
-napi_value checkError(napi_env env, napi_callback_info info) {
+static napi_value checkError(napi_env env, napi_callback_info info) {
   size_t argc = 1;
   napi_value args[1];
   NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
@@ -15,7 +15,7 @@ napi_value checkError(napi_env env, napi_callback_info info) {
   return result;
 }
 
-napi_value throwExistingError(napi_env env, napi_callback_info info) {
+static napi_value throwExistingError(napi_env env, napi_callback_info info) {
   napi_value message;
   napi_value error;
   NAPI_CALL(env, napi_create_string_utf8(
@@ -25,34 +25,34 @@ napi_value throwExistingError(napi_env env, napi_callback_info info) {
   return NULL;
 }
 
-napi_value throwError(napi_env env, napi_callback_info info) {
+static napi_value throwError(napi_env env, napi_callback_info info) {
   NAPI_CALL(env, napi_throw_error(env, NULL, "error"));
   return NULL;
 }
 
-napi_value throwRangeError(napi_env env, napi_callback_info info) {
+static napi_value throwRangeError(napi_env env, napi_callback_info info) {
   NAPI_CALL(env, napi_throw_range_error(env, NULL, "range error"));
   return NULL;
 }
 
-napi_value throwTypeError(napi_env env, napi_callback_info info) {
+static napi_value throwTypeError(napi_env env, napi_callback_info info) {
   NAPI_CALL(env, napi_throw_type_error(env, NULL, "type error"));
   return NULL;
 }
 
-napi_value throwErrorCode(napi_env env, napi_callback_info info) {
+static napi_value throwErrorCode(napi_env env, napi_callback_info info) {
   NAPI_CALL(env, napi_throw_error(env, "ERR_TEST_CODE", "Error [error]"));
   return NULL;
 }
 
-napi_value throwRangeErrorCode(napi_env env, napi_callback_info info) {
+static napi_value throwRangeErrorCode(napi_env env, napi_callback_info info) {
   NAPI_CALL(env, napi_throw_range_error(env,
                                         "ERR_TEST_CODE",
                                         "RangeError [range error]"));
   return NULL;
 }
 
-napi_value throwTypeErrorCode(napi_env env, napi_callback_info info) {
+static napi_value throwTypeErrorCode(napi_env env, napi_callback_info info) {
   NAPI_CALL(env, napi_throw_type_error(env,
                                        "ERR_TEST_CODE",
                                        "TypeError [type error]"));
@@ -60,7 +60,7 @@ napi_value throwTypeErrorCode(napi_env env, napi_callback_info info) {
 }
 
 
-napi_value createError(napi_env env, napi_callback_info info) {
+static napi_value createError(napi_env env, napi_callback_info info) {
   napi_value result;
   napi_value message;
   NAPI_CALL(env, napi_create_string_utf8(
@@ -69,7 +69,7 @@ napi_value createError(napi_env env, napi_callback_info info) {
   return result;
 }
 
-napi_value createRangeError(napi_env env, napi_callback_info info) {
+static napi_value createRangeError(napi_env env, napi_callback_info info) {
   napi_value result;
   napi_value message;
   NAPI_CALL(env, napi_create_string_utf8(
@@ -78,7 +78,7 @@ napi_value createRangeError(napi_env env, napi_callback_info info) {
   return result;
 }
 
-napi_value createTypeError(napi_env env, napi_callback_info info) {
+static napi_value createTypeError(napi_env env, napi_callback_info info) {
   napi_value result;
   napi_value message;
   NAPI_CALL(env, napi_create_string_utf8(
@@ -87,7 +87,7 @@ napi_value createTypeError(napi_env env, napi_callback_info info) {
   return result;
 }
 
-napi_value createErrorCode(napi_env env, napi_callback_info info) {
+static napi_value createErrorCode(napi_env env, napi_callback_info info) {
   napi_value result;
   napi_value message;
   napi_value code;
@@ -99,7 +99,7 @@ napi_value createErrorCode(napi_env env, napi_callback_info info) {
   return result;
 }
 
-napi_value createRangeErrorCode(napi_env env, napi_callback_info info) {
+static napi_value createRangeErrorCode(napi_env env, napi_callback_info info) {
   napi_value result;
   napi_value message;
   napi_value code;
@@ -113,7 +113,7 @@ napi_value createRangeErrorCode(napi_env env, napi_callback_info info) {
   return result;
 }
 
-napi_value createTypeErrorCode(napi_env env, napi_callback_info info) {
+static napi_value createTypeErrorCode(napi_env env, napi_callback_info info) {
   napi_value result;
   napi_value message;
   napi_value code;
@@ -135,7 +135,7 @@ static napi_value throwArbitrary(napi_env env, napi_callback_info info) {
   return NULL;
 }
 
-napi_value Init(napi_env env, napi_value exports) {
+static napi_value Init(napi_env env, napi_value exports) {
   napi_property_descriptor descriptors[] = {
     DECLARE_NAPI_PROPERTY("checkError", checkError),
     DECLARE_NAPI_PROPERTY("throwExistingError", throwExistingError),