diff --git a/tests/Buildalyzer.Tests/Integration/SimpleProjectsFixture.cs b/tests/Buildalyzer.Tests/Integration/SimpleProjectsFixture.cs
index 81cd2cfe..ccc3713c 100644
--- a/tests/Buildalyzer.Tests/Integration/SimpleProjectsFixture.cs
+++ b/tests/Buildalyzer.Tests/Integration/SimpleProjectsFixture.cs
@@ -704,10 +704,31 @@ public void GetsAdditionalFile()
         StringWriter log = new StringWriter();
         IProjectAnalyzer analyzer = GetProjectAnalyzer(@"ProjectWithAdditionalFile\ProjectWithAdditionalFile.csproj", log);
 
-        // When + then
-        analyzer.Build().First().AdditionalFiles.Select(Path.GetFileName)
-            .Should().BeEquivalentTo("message.txt");
-    }
+        // When
+        IEnumerable<string> additionalFiles = analyzer.Build().First().AdditionalFiles;
+
+        [Test]
+        public void GetsProjectFileAsAdditionalFile()
+        {
+            // Given
+            StringWriter log = new StringWriter();
+            IProjectAnalyzer analyzer = GetProjectAnalyzer(@"ProjectFileAsAdditionalFile\ProjectFileAsAdditionalFile.csproj", log);
+
+            // When
+            IEnumerable<string> additionalFiles = analyzer.Build().First().AdditionalFiles;
+
+            // Then
+            additionalFiles.ShouldBe(new[] { "ProjectFileAsAdditionalFile.csproj" }, log.ToString());
+        }
+
+        private static IProjectAnalyzer GetProjectAnalyzer(string projectFile, StringWriter log)
+        {
+            IProjectAnalyzer analyzer = new AnalyzerManager(
+                new AnalyzerManagerOptions
+                {
+                    LogWriter = log
+                })
+                .GetProject(GetProjectPath(projectFile));
 
     [Test]
     public void HandlesProcessFailure()
diff --git a/tests/projects/ProjectFileAsAdditionalFile/ProjectFileAsAdditionalFile.csproj b/tests/projects/ProjectFileAsAdditionalFile/ProjectFileAsAdditionalFile.csproj
new file mode 100644
index 00000000..be3e0013
--- /dev/null
+++ b/tests/projects/ProjectFileAsAdditionalFile/ProjectFileAsAdditionalFile.csproj
@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <ImplicitUsings>disable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <ProductName>Test project</ProductName>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <TargetFrameworks>net5.0;net6.0</TargetFrameworks>
+    <Nullable>annotations</Nullable>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'1' == '1'">
+    <ProductName>Test project</ProductName>
+  </PropertyGroup>
+ 
+  <ItemGroup>
+    <AdditionalFiles Include="*.??proj" Visible="false" />
+  </ItemGroup>
+
+</Project>
diff --git a/tests/projects/ProjectFileAsAdditionalFile/SomeClass.cs b/tests/projects/ProjectFileAsAdditionalFile/SomeClass.cs
new file mode 100644
index 00000000..775fdb94
--- /dev/null
+++ b/tests/projects/ProjectFileAsAdditionalFile/SomeClass.cs
@@ -0,0 +1,3 @@
+namespace ProjectWithAdditionalFile;
+
+public class SomeClass { }