diff --git a/tests/cases/conformance/es6/moduleExportsAmd/decoratedDefaultExportsGetExportedAmd.ts b/tests/cases/conformance/es6/moduleExportsAmd/decoratedDefaultExportsGetExportedAmd.ts
index 3b51b80619f..87fc8afd263 100644
--- a/tests/cases/conformance/es6/moduleExportsAmd/decoratedDefaultExportsGetExportedAmd.ts
+++ b/tests/cases/conformance/es6/moduleExportsAmd/decoratedDefaultExportsGetExportedAmd.ts
@@ -1,4 +1,5 @@
 // @target: ES6
+// @experimentalDecorators: true
 // @module: amd
 
 var decorator: ClassDecorator;
diff --git a/tests/cases/conformance/es6/moduleExportsCommonjs/decoratedDefaultExportsGetExportedCommonjs.ts b/tests/cases/conformance/es6/moduleExportsCommonjs/decoratedDefaultExportsGetExportedCommonjs.ts
index 3fc09a2eeb4..aefd07ffdb9 100644
--- a/tests/cases/conformance/es6/moduleExportsCommonjs/decoratedDefaultExportsGetExportedCommonjs.ts
+++ b/tests/cases/conformance/es6/moduleExportsCommonjs/decoratedDefaultExportsGetExportedCommonjs.ts
@@ -1,4 +1,5 @@
 // @target: ES6
+// @experimentalDecorators: true
 // @module: commonjs
 
 var decorator: ClassDecorator;
diff --git a/tests/cases/conformance/es6/moduleExportsSystem/decoratedDefaultExportsGetExportedSystem.ts b/tests/cases/conformance/es6/moduleExportsSystem/decoratedDefaultExportsGetExportedSystem.ts
index 7957b78c805..b871b3c7b35 100644
--- a/tests/cases/conformance/es6/moduleExportsSystem/decoratedDefaultExportsGetExportedSystem.ts
+++ b/tests/cases/conformance/es6/moduleExportsSystem/decoratedDefaultExportsGetExportedSystem.ts
@@ -1,4 +1,5 @@
 // @target: ES6
+// @experimentalDecorators: true
 // @module: system
 
 var decorator: ClassDecorator;
diff --git a/tests/cases/conformance/es6/moduleExportsUmd/decoratedDefaultExportsGetExportedUmd.ts b/tests/cases/conformance/es6/moduleExportsUmd/decoratedDefaultExportsGetExportedUmd.ts
index 9dc63bec9c3..9b0a7d773ef 100644
--- a/tests/cases/conformance/es6/moduleExportsUmd/decoratedDefaultExportsGetExportedUmd.ts
+++ b/tests/cases/conformance/es6/moduleExportsUmd/decoratedDefaultExportsGetExportedUmd.ts
@@ -1,4 +1,5 @@
 // @target: ES6
+// @experimentalDecorators: true
 // @module: umd
 
 var decorator: ClassDecorator;