diff --git a/escape-string-regexp/escape-string-regexp-tests.ts b/escape-string-regexp/escape-string-regexp-tests.ts
new file mode 100644
index 000000000..0e9e9e54c
--- /dev/null
+++ b/escape-string-regexp/escape-string-regexp-tests.ts
@@ -0,0 +1,8 @@
+/// <reference path="escape-string-regexp.d.ts"/>
+
+import escapeStringRegexp = require('escape-string-regexp');
+
+var inputString: string = '^abc$';
+var outputString: string;
+
+outputString = escapeStringRegexp(inputString);
diff --git a/escape-string-regexp/escape-string-regexp.d.ts b/escape-string-regexp/escape-string-regexp.d.ts
new file mode 100644
index 000000000..74b095823
--- /dev/null
+++ b/escape-string-regexp/escape-string-regexp.d.ts
@@ -0,0 +1,12 @@
+// Type definitions for escape-string-regexp
+// Project: https://github.com/sindresorhus/escape-string-regexp
+// Definitions by: kruncher <https://github.com/kruncher/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module "escape-string-regexp" {
+
+  function escapeStringRegexp(str: string): string;
+
+  export = escapeStringRegexp;
+
+}
diff --git a/format-unicorn/format-unicorn-safe-tests.ts b/format-unicorn/format-unicorn-safe-tests.ts
new file mode 100644
index 000000000..e83f2023f
--- /dev/null
+++ b/format-unicorn/format-unicorn-safe-tests.ts
@@ -0,0 +1,11 @@
+/// <reference path="format-unicorn-safe.d.ts"/>
+
+import formatUnicorn = require('format-unicorn/safe');
+
+// Safe version
+var outputString: string;
+
+outputString = formatUnicorn('Hello, {name}; you have {favoriteNumber}', {
+  name: "kruncher",
+  favoriteNumber: 42
+});
diff --git a/format-unicorn/format-unicorn-safe.d.ts b/format-unicorn/format-unicorn-safe.d.ts
new file mode 100644
index 000000000..adf3a62db
--- /dev/null
+++ b/format-unicorn/format-unicorn-safe.d.ts
@@ -0,0 +1,12 @@
+// Type definitions for format-unicorn
+// Project: https://github.com/tallesl/format-unicorn
+// Definitions by: kruncher <https://github.com/kruncher/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module 'format-unicorn/safe' {
+
+  function formatUnicornSafe(str: string, replacements: { }): string;
+
+  export = formatUnicornSafe;
+
+}
diff --git a/format-unicorn/format-unicorn-tests.ts b/format-unicorn/format-unicorn-tests.ts
new file mode 100644
index 000000000..e256b65ae
--- /dev/null
+++ b/format-unicorn/format-unicorn-tests.ts
@@ -0,0 +1,11 @@
+/// <reference path="format-unicorn.d.ts"/>
+
+import 'format-unicorn';
+
+// Unsafe version
+var outputString: string;
+
+outputString = 'Hello, {name}; you have {favoriteNumber}'.formatUnicorn({
+  name: "kruncher",
+  favoriteNumber: 42
+});
diff --git a/format-unicorn/format-unicorn.d.ts b/format-unicorn/format-unicorn.d.ts
new file mode 100644
index 000000000..d1780140f
--- /dev/null
+++ b/format-unicorn/format-unicorn.d.ts
@@ -0,0 +1,12 @@
+// Type definitions for format-unicorn
+// Project: https://github.com/tallesl/format-unicorn
+// Definitions by: kruncher <https://github.com/kruncher/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+interface String {
+  formatUnicorn(replacements: { }): string;
+}
+
+declare module "format-unicorn" {
+
+}