diff --git a/src/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.SourceGenerators.Testing/SourceGeneratorTest`1.cs b/src/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.SourceGenerators.Testing/SourceGeneratorTest`1.cs
index 2fd0206cf..7120b5256 100644
--- a/src/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.SourceGenerators.Testing/SourceGeneratorTest`1.cs
+++ b/src/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.SourceGenerators.Testing/SourceGeneratorTest`1.cs
@@ -60,8 +60,6 @@ protected override IEnumerable<DiagnosticAnalyzer> GetDiagnosticAnalyzers()
 
         public override async Task RunAsync(CancellationToken cancellationToken = default)
         {
-            Verify.NotEmpty($"{nameof(TestState)}.{nameof(SolutionState.Sources)}", TestState.Sources);
-
             var analyzers = GetDiagnosticAnalyzers().ToArray();
             var defaultDiagnostic = GetDefaultDiagnostic(analyzers);
             var supportedDiagnostics = analyzers.SelectMany(analyzer => analyzer.SupportedDiagnostics).ToImmutableArray();
diff --git a/tests/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.SourceGenerators.Testing.UnitTests/SourceGeneratorValidationTests.cs b/tests/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.SourceGenerators.Testing.UnitTests/SourceGeneratorValidationTests.cs
index d2db670ae..b226e905f 100644
--- a/tests/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.SourceGenerators.Testing.UnitTests/SourceGeneratorValidationTests.cs
+++ b/tests/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.SourceGenerators.Testing.UnitTests/SourceGeneratorValidationTests.cs
@@ -84,6 +84,27 @@ public async Task AddSimpleFileByGeneratorTypeWithEncoding()
             }.RunAsync();
         }
 
+        [Fact]
+        public async Task AddSimpleFileToEmptyProject()
+        {
+            await new CSharpSourceGeneratorTest<AddEmptyFile>
+            {
+                TestState =
+                {
+                    Sources =
+                    {
+                    },
+                },
+                FixedState =
+                {
+                    Sources =
+                    {
+                        (typeof(AddEmptyFile), "EmptyGeneratedFile.cs", string.Empty),
+                    },
+                },
+            }.RunAsync();
+        }
+
         [Fact]
         public async Task AddSimpleFileWithDiagnostic()
         {