diff --git a/doc/programmatic-api.md b/doc/programmatic-api.md
index c8db4a09b..69f2c73dd 100644
--- a/doc/programmatic-api.md
+++ b/doc/programmatic-api.md
@@ -35,15 +35,17 @@ console.log(gemini.config.rootUrl);
 
 ## Reading the tests
 
-`gemini.readTests(paths, grep)` — read all of the tests from specified paths into
+`gemini.readTests(paths, options)` — read all of the tests from specified paths into
 one suite collection.
 
 * `paths` is an array of files or directories paths containing Gemini tests.
   If not specified, will look for tests in `$projectRoot/gemini` directory.
 
-* `grep` is a regular expression to filter suites to read. By default, all tests
-  will be read. If this option is set, only suites with name matching the
-  pattern will be read.
+Options:
+
+* `grep` — regular expression to filter suites to read. By default, all tests
+  will be added to collection. If this option is set, only suites with name matching the
+  pattern will be added to collection.
 
 Returns promise which resolves to a `SuiteCollection` object.
 
diff --git a/lib/gemini.js b/lib/gemini.js
index 818002761..fbc3e6d8f 100644
--- a/lib/gemini.js
+++ b/lib/gemini.js
@@ -88,17 +88,7 @@ module.exports = class Gemini extends PassthroughEmitter {
         return this._exec(() => this._run(StateProcessor.createTester(this.config), paths, options));
     }
 
-    readTests(paths, options) {
-        if (_.isRegExp(options)) {
-            console.warn(chalk.yellow(
-                `Passing grep to readTests is deprecated. You should pass an object with options: {grep: ${options}}.`
-            ));
-
-            options = {grep: options};
-        } else {
-            options = options || {};
-        }
-
+    readTests(paths, options = {}) {
         return this._exec(() => this._readTests(paths, options));
     }
 
diff --git a/test/unit/gemini.js b/test/unit/gemini.js
index 2da29d9e9..12f48790d 100644
--- a/test/unit/gemini.js
+++ b/test/unit/gemini.js
@@ -340,13 +340,6 @@ describe('gemini', () => {
                     assert.include(allSuites, matchingBranchLeaf);
                 });
         });
-
-        it('should warn if RegExp was passed instead of object', () => {
-            return readTests_(null, new RegExp(/string/))
-                .then(() => assert.calledWith(console.warn, sinon.match(
-                    'Passing grep to readTests is deprecated. You should pass an object with options: {grep: /string/}.'
-                )));
-        });
     });
 
     describe('test', () => {