diff --git a/src/My.Extensions.Localization.Json/JsonStringLocalizer.cs b/src/My.Extensions.Localization.Json/JsonStringLocalizer.cs
index d60aff8..2d45c7c 100644
--- a/src/My.Extensions.Localization.Json/JsonStringLocalizer.cs
+++ b/src/My.Extensions.Localization.Json/JsonStringLocalizer.cs
@@ -19,7 +19,7 @@ public class JsonStringLocalizer : IStringLocalizer
         private readonly IResourceStringProvider _resourceStringProvider;
         private readonly ILogger _logger;
 
-        private string _searchedLocation;
+        private string _searchedLocation = string.Empty;
 
         public JsonStringLocalizer(
             JsonResourceManager jsonResourceManager,
diff --git a/test/My.Extensions.Localization.Json.Tests/JsonStringLocalizerFactoryTests.cs b/test/My.Extensions.Localization.Json.Tests/JsonStringLocalizerFactoryTests.cs
index 1bf46c9..2687450 100644
--- a/test/My.Extensions.Localization.Json.Tests/JsonStringLocalizerFactoryTests.cs
+++ b/test/My.Extensions.Localization.Json.Tests/JsonStringLocalizerFactoryTests.cs
@@ -95,7 +95,7 @@ public async Task LocalizerReturnsTranslationFromInnerClass()
                 {
                     app.UseRequestLocalization("en", "ar");
 
-                    app.Run(context =>
+                    app.Run(async context =>
                     {
                         var localizer = context.RequestServices.GetService<IStringLocalizer<Model>>();
 
@@ -103,7 +103,7 @@ public async Task LocalizerReturnsTranslationFromInnerClass()
 
                         Assert.Equal("مرحباً", localizer["Hello"]);
 
-                        return Task.FromResult(0);
+                        await Task.CompletedTask;
                     });
                 });
 
diff --git a/test/My.Extensions.Localization.Json.Tests/JsonStringLocalizerTests.cs b/test/My.Extensions.Localization.Json.Tests/JsonStringLocalizerTests.cs
index a2f7765..5b3cdae 100644
--- a/test/My.Extensions.Localization.Json.Tests/JsonStringLocalizerTests.cs
+++ b/test/My.Extensions.Localization.Json.Tests/JsonStringLocalizerTests.cs
@@ -149,7 +149,7 @@ public async void CultureBasedResourcesUsesIStringLocalizer()
                 {
                     app.UseRequestLocalization("en-US", "fr-FR");
 
-                    app.Run(context =>
+                    app.Run(async context =>
                     {
                         var localizer = context.RequestServices.GetService<IStringLocalizer<JsonStringLocalizer>>();
 
@@ -157,7 +157,7 @@ public async void CultureBasedResourcesUsesIStringLocalizer()
 
                         Assert.Equal("Bonjour", localizer["Hello"]);
 
-                        return Task.FromResult(0);
+                        await Task.CompletedTask;
                     });
                 });