1 files changed, 1 insertions, 1 deletions

diff --git a/src/test/Example.Extension/ExampleWindowsInstallerBackendExtension.cs b/src/test/Example.Extension/ExampleWindowsInstallerBackendExtension.cs
index 87b7855c..afccc56f 100644
--- a/src/test/Example.Extension/ExampleWindowsInstallerBackendExtension.cs
+++ b/src/test/Example.Extension/ExampleWindowsInstallerBackendExtension.cs
@@ -9,7 +9,7 @@ namespace Example.Extension
 
     internal class ExampleWindowsInstallerBackendExtension : BaseWindowsInstallerBackendBinderExtension
     {
-        public override IEnumerable<TableDefinition> TableDefinitions => ExampleTableDefinitions.All;
+        public override IReadOnlyCollection<TableDefinition> TableDefinitions => ExampleTableDefinitions.All;
 
         public override bool TryProcessSymbol(IntermediateSection section, IntermediateSymbol symbol, WindowsInstallerData output, TableDefinitionCollection tableDefinitions)
         {