diff --git a/docs/WriteUnitTests.md b/docs/WriteUnitTests.md
index fd88634..eeeca9a 100644
--- a/docs/WriteUnitTests.md
+++ b/docs/WriteUnitTests.md
@@ -57,7 +57,7 @@ public class CustomerRepository
 
 Which use the following `DbContext` implementation:
 
-```json
+```csharp
 public class DemoAppDbContext : DbContext
 {
     public DemoAppDbContext(DbContextOptions<DemoAppDbContext> options)