diff --git a/tests/cases/compiler/controlFlowLetVar.ts b/tests/cases/compiler/controlFlowLetVar.ts
new file mode 100644
index 00000000000..6ef62cca21a
--- /dev/null
+++ b/tests/cases/compiler/controlFlowLetVar.ts
@@ -0,0 +1,119 @@
+// @strictNullChecks: true
+
+declare let cond: boolean;
+
+function f1() {
+    let x;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f2() {
+    let x = undefined;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f3() {
+    let x = null;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f4() {
+    let x: any;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f5() {
+    var x;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f6() {
+    var x = undefined;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f7() {
+    var x = null;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f8() {
+    var x: any;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f9() {
+    let x;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+    function f() {
+        const z = x;
+    }
+}
+
+function f10() {
+    let x;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+    const f = () => {
+        const z = x;
+    };
+}
\ No newline at end of file
diff --git a/tests/cases/compiler/controlFlowNoImplicitAny.ts b/tests/cases/compiler/controlFlowNoImplicitAny.ts
new file mode 100644
index 00000000000..3c909ba61b6
--- /dev/null
+++ b/tests/cases/compiler/controlFlowNoImplicitAny.ts
@@ -0,0 +1,120 @@
+// @strictNullChecks: true
+// @noImplicitAny: true
+
+declare let cond: boolean;
+
+function f1() {
+    let x;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f2() {
+    let x = undefined;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f3() {
+    let x = null;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f4() {
+    let x: any;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f5() {
+    var x;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f6() {
+    var x = undefined;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f7() {
+    var x = null;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f8() {
+    var x: any;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+}
+
+function f9() {
+    let x;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+    function f() {
+        const z = x;
+    }
+}
+
+function f10() {
+    let x;
+    if (cond) {
+        x = 1;
+    }
+    if (cond) {
+        x = "hello";
+    }
+    const y = x;
+    const f = () => {
+        const z = x;
+    };
+}
\ No newline at end of file