diff --git a/src/NGherkin/GherkinFeature.cs b/src/NGherkin/GherkinFeature.cs
index cd78b66..1cd4891 100644
--- a/src/NGherkin/GherkinFeature.cs
+++ b/src/NGherkin/GherkinFeature.cs
@@ -2,7 +2,7 @@
 
 namespace NGherkin;
 
-public sealed class GherkinFeature(
+internal sealed class GherkinFeature(
     string name,
     GherkinDocument gherkinDocument)
 {
diff --git a/src/NGherkin/GherkinStep.cs b/src/NGherkin/GherkinStep.cs
index acb5589..25c03e5 100644
--- a/src/NGherkin/GherkinStep.cs
+++ b/src/NGherkin/GherkinStep.cs
@@ -3,7 +3,7 @@
 
 namespace NGherkin;
 
-public sealed class GherkinStep(
+internal sealed class GherkinStep(
     Type serviceType,
     MethodInfo method,
     string keyword,
diff --git a/src/NGherkin/NGherkin.csproj b/src/NGherkin/NGherkin.csproj
index d27a493..cf0e578 100644
--- a/src/NGherkin/NGherkin.csproj
+++ b/src/NGherkin/NGherkin.csproj
@@ -5,6 +5,10 @@
     <PackageReference Include="Gherkin" Version="27.0.0" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
   </ItemGroup>
+
+  <ItemGroup>
+    <InternalsVisibleTo Include="NGherkin.TestAdapter"/>
+  </ItemGroup>
   
   <ItemGroup>
     <None Include="../NGherkin.props" Pack="true" PackagePath="build" />