diff --git a/test/addons-napi/common.h b/test/addons-napi/common.h
index eae2d48b04..e9640935d4 100644
--- a/test/addons-napi/common.h
+++ b/test/addons-napi/common.h
@@ -14,15 +14,17 @@
         "empty error message";                                           \
       napi_throw_error((env), error_message);                            \
     }                                                                    \
-  } while(0);
+  } while (0)
 
 #define NAPI_ASSERT_BASE(env, assertion, message, ret_val)               \
-  if (!(assertion)) {                                                    \
-    napi_throw_error(                                                    \
-        (env),                                                           \
-        "assertion (" #assertion ") failed: " message);                  \
-    return ret_val;                                                      \
-  }
+  do {                                                                   \
+    if (!(assertion)) {                                                  \
+      napi_throw_error(                                                  \
+          (env),                                                         \
+          "assertion (" #assertion ") failed: " message);                \
+      return ret_val;                                                    \
+    }                                                                    \
+  } while (0)
 
 // Returns NULL on failed assertion.
 // This is meant to be used inside napi_callback methods.
@@ -35,10 +37,12 @@
   NAPI_ASSERT_BASE(env, assertion, message, NAPI_RETVAL_NOTHING)
 
 #define NAPI_CALL_BASE(env, the_call, ret_val)                           \
-  if ((the_call) != napi_ok) {                                           \
-    GET_AND_THROW_LAST_ERROR((env));                                     \
-    return ret_val;                                                      \
-  }
+  do {                                                                   \
+    if ((the_call) != napi_ok) {                                         \
+      GET_AND_THROW_LAST_ERROR((env));                                   \
+      return ret_val;                                                    \
+    }                                                                    \
+  } while (0)
 
 // Returns NULL if the_call doesn't return napi_ok.
 #define NAPI_CALL(env, the_call)                                         \
diff --git a/test/addons-napi/test_object/test_object.c b/test/addons-napi/test_object/test_object.c
index 96a7aa9c20..663e561a35 100644
--- a/test/addons-napi/test_object/test_object.c
+++ b/test/addons-napi/test_object/test_object.c
@@ -53,7 +53,7 @@ napi_value Set(napi_env env, napi_callback_info info) {
   NAPI_CALL(env, napi_set_property(env, args[0], args[1], args[2]));
 
   napi_value valuetrue;
-  NAPI_CALL(env, napi_get_boolean(env, true, &valuetrue))
+  NAPI_CALL(env, napi_get_boolean(env, true, &valuetrue));
 
   return valuetrue;
 }
diff --git a/test/addons-napi/test_reference/test_reference.c b/test/addons-napi/test_reference/test_reference.c
index 9be9fd135f..0d3925ee5d 100644
--- a/test/addons-napi/test_reference/test_reference.c
+++ b/test/addons-napi/test_reference/test_reference.c
@@ -58,13 +58,13 @@ napi_value CheckExternal(napi_env env, napi_callback_info info) {
   napi_valuetype argtype;
   NAPI_CALL(env, napi_typeof(env, arg, &argtype));
 
-  NAPI_ASSERT(env, argtype == napi_external, "Expected an external value.")
+  NAPI_ASSERT(env, argtype == napi_external, "Expected an external value.");
 
   void* data;
   NAPI_CALL(env, napi_get_value_external(env, arg, &data));
 
   NAPI_ASSERT(env, data != NULL && *(int*)data == test_value,
-    "An external data value of 1 was expected.")
+    "An external data value of 1 was expected.");
 
   return NULL;
 }