diff --git a/test/TestRule.ts b/test/TestRule.ts
index 29d80fd..2812cc5 100644
--- a/test/TestRule.ts
+++ b/test/TestRule.ts
@@ -105,6 +105,7 @@ describe('rule visitor', () => {
       coerce: false,
       defaults: false,
       logger: new ConsoleLogger(),
+      mutate: false,
     });
     const data = {};
     const rule = new Rule({
@@ -134,6 +135,7 @@ describe('rule visitor', () => {
       coerce: false,
       defaults: false,
       logger: new ConsoleLogger(),
+      mutate: false,
     });
     const data = {};
     const rule = new Rule({
diff --git a/test/visitor/TestContext.ts b/test/visitor/TestContext.ts
index 22d0a4b..a3bdb4b 100644
--- a/test/visitor/TestContext.ts
+++ b/test/visitor/TestContext.ts
@@ -8,6 +8,7 @@ describe('visitor context', () => {
       coerce: false,
       defaults: false,
       logger: new ConsoleLogger(),
+      mutate: false,
     });
 
     const nextCtx = firstCtx.mergeResult({