diff --git a/tests/EntityFrameworkCore.Projectables.FunctionalTests/Helpers/SampleDbContext.cs b/tests/EntityFrameworkCore.Projectables.FunctionalTests/Helpers/SampleDbContext.cs
index 094c5c8..23320da 100644
--- a/tests/EntityFrameworkCore.Projectables.FunctionalTests/Helpers/SampleDbContext.cs
+++ b/tests/EntityFrameworkCore.Projectables.FunctionalTests/Helpers/SampleDbContext.cs
@@ -15,7 +15,9 @@ namespace EntityFrameworkCore.Projectables.FunctionalTests.Helpers
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
             optionsBuilder.UseSqlServer("Server=(localdb)\v11.0;Integrated Security=true"); // Fake connection string as we're actually never connecting
-            optionsBuilder.UseProjectables();
+            optionsBuilder.UseProjectables(options => {
+                options.CompatibilityMode(Infrastructure.CompatibilityMode.Full); // Needed by our ComplexModelTests
+            });
         }
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)