diff --git a/framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/Localization/Resource/pl.json b/framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/Localization/Resource/pl-PL.json
similarity index 79%
rename from framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/Localization/Resource/pl.json
rename to framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/Localization/Resource/pl-PL.json
index c794c9c123..5370ccdf57 100644
--- a/framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/Localization/Resource/pl.json
+++ b/framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/Localization/Resource/pl-PL.json
@@ -1,5 +1,5 @@
 {
-  "culture": "pl",
+  "culture": "pl-PL",
   "texts": {
     "BirthDate": "Data urodzenia",
     "Value1": "Wartość jeden" 
diff --git a/framework/test/Volo.Abp.Emailing.Tests/Volo/Abp/Emailing/Localization/pl.json b/framework/test/Volo.Abp.Emailing.Tests/Volo/Abp/Emailing/Localization/pl-PL.json
similarity index 63%
rename from framework/test/Volo.Abp.Emailing.Tests/Volo/Abp/Emailing/Localization/pl.json
rename to framework/test/Volo.Abp.Emailing.Tests/Volo/Abp/Emailing/Localization/pl-PL.json
index 6dd6654aa1..3b4ee39a1e 100644
--- a/framework/test/Volo.Abp.Emailing.Tests/Volo/Abp/Emailing/Localization/pl.json
+++ b/framework/test/Volo.Abp.Emailing.Tests/Volo/Abp/Emailing/Localization/pl-PL.json
@@ -1,5 +1,5 @@
 {
-  "culture": "pl",
+  "culture": "pl-PL",
   "texts": {
     "hello": "witaj"
   }
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/CountryNames/pl.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/CountryNames/pl-PL.json
similarity index 79%
rename from framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/CountryNames/pl.json
rename to framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/CountryNames/pl-PL.json
index 5e343cf2f9..a25b79d6d8 100644
--- a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/CountryNames/pl.json
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/CountryNames/pl-PL.json
@@ -1,5 +1,5 @@
 {
-  "culture": "pl",
+  "culture": "pl-PL",
   "texts": {
     "USA": "Stany Zjednoczone Ameryki",
     "Brazil": "Brazylia"
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/Validation/pl.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/Validation/pl-PL.json
similarity index 86%
rename from framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/Validation/pl.json
rename to framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/Validation/pl-PL.json
index 1d0bfdf66a..cce4cfd722 100644
--- a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/Validation/pl.json
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Base/Validation/pl-PL.json
@@ -1,5 +1,5 @@
 {
-  "culture": "pl",
+  "culture": "pl-PL",
   "texts": {
     "ThisFieldIsRequired": "To pole jest wymagane",
     "MaxLenghtErrorMessage": "To pole może mieć maksymalnie '{0}' znaków"
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/pl.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/pl-PL.json
similarity index 92%
rename from framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/pl.json
rename to framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/pl-PL.json
index d014bc7b30..e208fb12b3 100644
--- a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/pl.json
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/pl-PL.json
@@ -1,5 +1,5 @@
 {
-  "culture": "pl",
+  "culture": "pl-PL",
   "texts": {
     "Hello <b>{0}</b>.": "Witaj <b>{0}</b>.",
     "Car": "Samochód",
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/SourceExt/pl.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/SourceExt/pl-PL.json
similarity index 69%
rename from framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/SourceExt/pl.json
rename to framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/SourceExt/pl-PL.json
index 2935790010..5b754a7ae1 100644
--- a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/SourceExt/pl.json
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/SourceExt/pl-PL.json
@@ -1,5 +1,5 @@
 {
-  "culture": "pl",
+  "culture": "pl-PL",
   "texts": {
     "SeeYou": "Do zobaczenia"
   }