diff --git a/tests/cases/conformance/statements/for-inStatements/for-inStatementsArray.ts b/tests/cases/conformance/statements/for-inStatements/for-inStatementsArray.ts
new file mode 100644
index 00000000000..e8dc484c0fa
--- /dev/null
+++ b/tests/cases/conformance/statements/for-inStatements/for-inStatementsArray.ts
@@ -0,0 +1,11 @@
+let a: Date[];
+let b: boolean[];
+
+for (let x in a) {
+    let a1 = a[x];
+    let a2 = a[(x)];
+    let a3 = a[+x];
+    let b1 = b[x];
+    let b2 = b[(x)];
+    let b3 = b[+x];
+}
diff --git a/tests/cases/conformance/statements/for-inStatements/for-inStatementsArrayErrors.ts b/tests/cases/conformance/statements/for-inStatements/for-inStatementsArrayErrors.ts
new file mode 100644
index 00000000000..c87ab6cea03
--- /dev/null
+++ b/tests/cases/conformance/statements/for-inStatements/for-inStatementsArrayErrors.ts
@@ -0,0 +1,19 @@
+// @noImplicitAny: true
+
+let a: Date[];
+
+for (let x in a) {
+    let a1 = a[x + 1];
+    let a2 = a[x - 1];
+    if (x === 1) {
+    }
+    let a3 = x.unknownProperty;
+}
+
+var i: number;
+for (var i in a ) {
+}
+
+var j: any;
+for (var j in a ) {
+}