diff --git a/.gitignore b/.gitignore
index 582643d..0d43cfc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -374,3 +374,4 @@ FodyWeavers.xsd
 /SystranTests/TestFiles/Translate_output.txt
 /SystranTests/TestFiles/Translate_output_translated.txt
 /Tests.Systran/appsettings.json
+/Tests.Systran/appsettings.json
diff --git a/Apps.Systran/Actions/DictionaryActions.cs b/Apps.Systran/Actions/DictionaryActions.cs
index 40bb05a..7877644 100644
--- a/Apps.Systran/Actions/DictionaryActions.cs
+++ b/Apps.Systran/Actions/DictionaryActions.cs
@@ -55,7 +55,7 @@ public async Task<CreateDictionaryResponse> CreateDictionary(
                 importEntriesRequest.AddFile("inputFile",
                     stream.ToArray(),
                     "ConvertedDictionary.tsv",
-                    "text/plain");
+                    "text/xml");
             }
 
             var importResponse = await Client.ExecuteWithErrorHandling<ImportResponse>(importEntriesRequest);
diff --git a/Apps.Systran/Api/SystranClient.cs b/Apps.Systran/Api/SystranClient.cs
index e4994b4..fa519b3 100644
--- a/Apps.Systran/Api/SystranClient.cs
+++ b/Apps.Systran/Api/SystranClient.cs
@@ -30,7 +30,7 @@ protected override Exception ConfigureErrorException(RestResponse response)
 
         if (errors != null && !string.IsNullOrEmpty(errors.Message))
         {
-            return new($"Systran API Error: {errors.Message}");
+            throw new PluginApplicationException($"Systran API Error: {errors.Message}");
         }
 
         return new("Unknown error");
diff --git a/Tests.Systran/Tests.Systran.csproj b/Tests.Systran/Tests.Systran.csproj
index 9433502..660a130 100644
--- a/Tests.Systran/Tests.Systran.csproj
+++ b/Tests.Systran/Tests.Systran.csproj
@@ -27,6 +27,9 @@
   </ItemGroup>
 
   <ItemGroup>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <None Update="appsettings.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>