diff --git a/composer.json b/composer.json
index 9b0a881f216e2b0d5db078d77bb0833922f26b43..802a169dab89258ddba3aab9a3117bfa4e611043 100644
--- a/composer.json
+++ b/composer.json
@@ -16,9 +16,9 @@
         "wikimedia/composer-merge-plugin": "^1.4"
     },
     "require-dev": {
-        "behat/mink": "1.7.x-dev",
+        "behat/mink": "^1.8",
         "behat/mink-goutte-driver": "^1.2",
-        "behat/mink-selenium2-driver": "1.3.x-dev",
+        "behat/mink-selenium2-driver": "^1.4",
         "composer/composer": "^1.9.1",
         "drupal/coder": "^8.3.7",
         "mikey179/vfsstream": "^1.6.8",
@@ -94,8 +94,7 @@
         "drupal-phpunit-upgrade-check": "Drupal\\Core\\Composer\\Composer::upgradePHPUnit",
         "drupal-phpunit-upgrade": "@composer update phpunit/phpunit symfony/phpunit-bridge phpspec/prophecy symfony/yaml --with-dependencies --no-progress",
         "post-update-cmd": [
-            "Drupal\\Composer\\Composer::generateMetapackages",
-            "Drupal\\Composer\\Composer::ensureBehatDriverVersions"
+            "Drupal\\Composer\\Composer::generateMetapackages"
         ],
         "phpcs": "phpcs --standard=core/phpcs.xml.dist --runtime-set installed_paths $($COMPOSER_BINARY config vendor-dir)/drupal/coder/coder_sniffer --",
         "phpcbf": "phpcbf --standard=core/phpcs.xml.dist --runtime-set installed_paths $($COMPOSER_BINARY config vendor-dir)/drupal/coder/coder_sniffer --"
diff --git a/composer.lock b/composer.lock
index 14af35207b3fe9339cb7e49cdf84784b6d3a1032..c66de3c2a865ee72ada79b50885bdee3d0bf641c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d8477fb085432c15724c090b7d20f6d2",
+    "content-hash": "9f09812034693639943c0b66284866c2",
     "packages": [
         {
             "name": "asm89/stack-cors",
@@ -3734,24 +3734,26 @@
     "packages-dev": [
         {
             "name": "behat/mink",
-            "version": "dev-master",
+            "version": "v1.8.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/minkphp/Mink.git",
-                "reference": "a534fe7dac9525e8e10ca68e737c3d7e5058ec83"
+                "reference": "e1772aabb6b654464264a6cc72158c8b3409d8bc"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/minkphp/Mink/zipball/a534fe7dac9525e8e10ca68e737c3d7e5058ec83",
-                "reference": "a534fe7dac9525e8e10ca68e737c3d7e5058ec83",
+                "url": "https://api.github.com/repos/minkphp/Mink/zipball/e1772aabb6b654464264a6cc72158c8b3409d8bc",
+                "reference": "e1772aabb6b654464264a6cc72158c8b3409d8bc",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.1",
-                "symfony/css-selector": "^2.7|^3.0|^4.0"
+                "symfony/css-selector": "^2.7|^3.0|^4.0|^5.0"
             },
             "require-dev": {
-                "symfony/phpunit-bridge": "^4.2"
+                "phpunit/phpunit": "^4.8.36 || ^5.7.27 || ^6.5.14 || ^7.5.20",
+                "symfony/debug": "^2.7|^3.0|^4.0",
+                "symfony/phpunit-bridge": "^3.4.38 || ^5.0.5"
             },
             "suggest": {
                 "behat/mink-browserkit-driver": "extremely fast headless driver for Symfony\\Kernel-based apps (Sf2, Silex)",
@@ -3763,7 +3765,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.7.x-dev"
+                    "dev-master": "1.8.x-dev"
                 }
             },
             "autoload": {
@@ -3789,7 +3791,7 @@
                 "testing",
                 "web"
             ],
-            "time": "2019-07-15T12:45:29+00:00"
+            "time": "2020-03-11T15:26:34+00:00"
         },
         {
             "name": "behat/mink-browserkit-driver",
@@ -3904,16 +3906,16 @@
         },
         {
             "name": "behat/mink-selenium2-driver",
-            "version": "1.3.x-dev",
+            "version": "v1.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/minkphp/MinkSelenium2Driver.git",
-                "reference": "0a09c4341621fca937a726827611b20ce3e2c259"
+                "reference": "312a967dd527f28980cce40850339cd5316da092"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/minkphp/MinkSelenium2Driver/zipball/0a09c4341621fca937a726827611b20ce3e2c259",
-                "reference": "0a09c4341621fca937a726827611b20ce3e2c259",
+                "url": "https://api.github.com/repos/minkphp/MinkSelenium2Driver/zipball/312a967dd527f28980cce40850339cd5316da092",
+                "reference": "312a967dd527f28980cce40850339cd5316da092",
                 "shasum": ""
             },
             "require": {
@@ -3927,7 +3929,7 @@
             "type": "mink-driver",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.3.x-dev"
+                    "dev-master": "1.4.x-dev"
                 }
             },
             "autoload": {
@@ -3961,7 +3963,7 @@
                 "testing",
                 "webdriver"
             ],
-            "time": "2019-09-02T09:46:54+00:00"
+            "time": "2020-03-11T14:43:21+00:00"
         },
         {
             "name": "composer/ca-bundle",
@@ -6537,9 +6539,7 @@
     "stability-flags": {
         "drupal/core": 20,
         "drupal/core-project-message": 20,
-        "drupal/core-vendor-hardening": 20,
-        "behat/mink": 20,
-        "behat/mink-selenium2-driver": 20
+        "drupal/core-vendor-hardening": 20
     },
     "prefer-stable": true,
     "prefer-lowest": false,
diff --git a/composer/Composer.php b/composer/Composer.php
index c3c6a39e939c65af7639f3eed28126f3b609b508..0a76fc717566743b4811de0c85db2c477449ee8d 100644
--- a/composer/Composer.php
+++ b/composer/Composer.php
@@ -6,7 +6,6 @@
 use Composer\Script\Event;
 use Composer\Semver\Comparator;
 use Drupal\Composer\Generator\PackageGenerator;
-use Drupal\Composer\Generator\Util\DrupalCoreComposer;
 
 /**
  * Provides static functions for composer script events. See also
@@ -40,34 +39,6 @@ public static function ensureComposerVersion() {
     }
   }
 
-  /**
-   * Ensure that the right version of behat/mink-selenium2-driver is locked.
-   * Throw an exception if we do not have 1.3.x-dev.
-   *
-   * @todo: Remove this once https://www.drupal.org/node/3078671 is fixed.
-   */
-  public static function ensureBehatDriverVersions() {
-    $drupalCoreComposer = DrupalCoreComposer::createFromPath(getcwd());
-
-    $expectedVersion = '1.3.x-dev';
-    $behatMinkSelenium2DriverInfo = $drupalCoreComposer->packageLockInfo('behat/mink-selenium2-driver', TRUE);
-    if ($behatMinkSelenium2DriverInfo['version'] != $expectedVersion) {
-      $drupalVersion = static::drupalVersionBranch();
-      $message = <<< __EOT__
-Drupal requires behat/mink-selenium2-driver:$expectedVersion in its composer.json
-file, but it is pinned to {$behatMinkSelenium2DriverInfo['version']} in the composer.lock file.
-This sometimes happens when Composer becomes confused. To fix:
-
-1. `git checkout -- composer.lock`, or otherwise reset to a known-good lock file.
-2. `rm -rf vendor`
-3. `composer install`
-4. `COMPOSER_ROOT_VERSION={$drupalVersion} composer update ...` (where ... is
-   the update arguments you wish to run, e.g. --lock).
-__EOT__;
-      throw new \RuntimeException($message);
-    }
-  }
-
   /**
    * Return the branch name the current Drupal version is associated with.
    *
diff --git a/composer/Generator/Builder/DrupalDevDependenciesBuilder.php b/composer/Generator/Builder/DrupalDevDependenciesBuilder.php
index 43e80fc37d7f1acdfb610869f5a1277c9977a557..b282d236f1a31790f3a29dd9183e080e2255fb23 100644
--- a/composer/Generator/Builder/DrupalDevDependenciesBuilder.php
+++ b/composer/Generator/Builder/DrupalDevDependenciesBuilder.php
@@ -24,18 +24,6 @@ public function getPackage() {
     // Put everything from Drupal's "require-dev" into our "require" section.
     $composer['require'] = $this->drupalCoreInfo->getRequireDev();
 
-    // If the require-dev is bringing in a dev version of behat/mink, convert
-    // the requirement to a more flexible set of versions.
-    // @todo: remove when https://www.drupal.org/node/3078671 is fixed.
-    if (isset($composer['require']['behat/mink']) && ($composer['require']['behat/mink'] == '1.7.x-dev')) {
-      $composer['require']['behat/mink'] = '1.8.0 | 1.7.1.1 | 1.7.x-dev';
-    }
-
-    // Do the same sort of conversion for behat/mink-selenium2-driver.
-    if (isset($composer['require']['behat/mink-selenium2-driver']) && ($composer['require']['behat/mink-selenium2-driver'] == '1.3.x-dev')) {
-      $composer['require']['behat/mink-selenium2-driver'] = '1.4.0 | 1.3.1.1 | 1.3.x-dev';
-    }
-
     // Sort our required packages by key.
     ksort($composer['require']);
 
diff --git a/composer/Generator/Builder/DrupalPinnedDevDependenciesBuilder.php b/composer/Generator/Builder/DrupalPinnedDevDependenciesBuilder.php
index 73023c74a425cc9b6413a71f92e5576d81f87e3f..a00309281ec2f755dc33e4212ca100d193da768a 100644
--- a/composer/Generator/Builder/DrupalPinnedDevDependenciesBuilder.php
+++ b/composer/Generator/Builder/DrupalPinnedDevDependenciesBuilder.php
@@ -28,21 +28,8 @@ public function getPackage() {
     $composerLockData = $this->drupalCoreInfo->composerLock();
 
     if (isset($composerLockData['packages-dev'])) {
-
       foreach ($composerLockData['packages-dev'] as $package) {
         $composer['require'][$package['name']] = $package['version'];
-
-        // If the require-dev is bringing in a dev version of behat/mink,
-        // convert the requirement to a more flexible set of versions.
-        // @todo: remove when https://www.drupal.org/node/3078671 is fixed.
-        if (($package['name'] == 'behat/mink') && (($package['version'] == 'dev-master') || ($package['version'] == '1.7.x-dev'))) {
-          $composer['require']['behat/mink'] = '1.8.0 | 1.7.1.1 | 1.7.x-dev';
-        }
-
-        // Do the same sort of conversion for behat/mink-selenium2-driver.
-        if (($package['name'] == 'behat/mink-selenium2-driver') && (($package['version'] == 'dev-master') || ($package['version'] == '1.3.x-dev'))) {
-          $composer['require']['behat/mink-selenium2-driver'] = '1.4.0 | 1.3.1.1 | 1.3.x-dev';
-        }
       }
     }
     return $composer;
diff --git a/composer/Metapackage/DevDependencies/composer.json b/composer/Metapackage/DevDependencies/composer.json
index 6b8e783cc4dcdac696d561e89ae79d1c50710193..03a9386fb9f8a87f22bb82c8e4a61c532b48b324 100644
--- a/composer/Metapackage/DevDependencies/composer.json
+++ b/composer/Metapackage/DevDependencies/composer.json
@@ -7,9 +7,9 @@
         "webflo/drupal-core-require-dev": "*"
     },
     "require": {
-        "behat/mink": "1.8.0 | 1.7.1.1 | 1.7.x-dev",
+        "behat/mink": "^1.8",
         "behat/mink-goutte-driver": "^1.2",
-        "behat/mink-selenium2-driver": "1.4.0 | 1.3.1.1 | 1.3.x-dev",
+        "behat/mink-selenium2-driver": "^1.4",
         "composer/composer": "^1.9.1",
         "drupal/coder": "^8.3.7",
         "easyrdf/easyrdf": "^0.9",
diff --git a/composer/Metapackage/PinnedDevDependencies/composer.json b/composer/Metapackage/PinnedDevDependencies/composer.json
index 0cdef50e21b21bceffd5f75aa9e56226c3797724..d1ab91c66a6ce3ca71730b2324125467b1bb121d 100644
--- a/composer/Metapackage/PinnedDevDependencies/composer.json
+++ b/composer/Metapackage/PinnedDevDependencies/composer.json
@@ -8,10 +8,10 @@
     },
     "require": {
         "drupal/core": "9.0.x-dev",
-        "behat/mink": "1.8.0 | 1.7.1.1 | 1.7.x-dev",
+        "behat/mink": "v1.8.0",
         "behat/mink-browserkit-driver": "1.3.3",
         "behat/mink-goutte-driver": "v1.2.1",
-        "behat/mink-selenium2-driver": "1.4.0 | 1.3.1.1 | 1.3.x-dev",
+        "behat/mink-selenium2-driver": "v1.4.0",
         "composer/ca-bundle": "1.2.6",
         "composer/composer": "1.9.3",
         "composer/spdx-licenses": "1.5.3",
diff --git a/core/tests/Drupal/Tests/Composer/ComposerTest.php b/core/tests/Drupal/Tests/Composer/ComposerTest.php
index 7728187888e3976163bb14a90aec216d08382e72..2e1d1bdfaba55a035dcd82cbd7bf70aa5d208744 100644
--- a/core/tests/Drupal/Tests/Composer/ComposerTest.php
+++ b/core/tests/Drupal/Tests/Composer/ComposerTest.php
@@ -25,23 +25,4 @@ public function testEnsureComposerVersion() {
     }
   }
 
-  /**
-   * Verify that Composer::ensureBehatDriverVersions() detects a good version.
-   *
-   * @covers::ensureBehatDriverVersions
-   */
-  public function testEnsureBehatDriverVersions() {
-    // First call 'ensureBehatDriverVersions' test directly using Drupal's
-    // composer.lock. It should not fail.
-    chdir($this->root);
-    $this->assertNull(Composer::ensureBehatDriverVersions());
-
-    // Next, call 'ensureBehatDriverVersions' again, this time using a fixture
-    // with a known-bad version number.
-    $this->expectException(\RuntimeException::class);
-    $this->expectExceptionMessageRegExp('#^Drupal requires behat/mink-selenium2-driver:1.3.x-dev#');
-    chdir(__DIR__ . '/fixtures/ensureBehatDriverVersionsFixture');
-    $this->assertNull(Composer::ensureBehatDriverVersions());
-  }
-
 }
diff --git a/core/tests/Drupal/Tests/Composer/Generator/BuilderTest.php b/core/tests/Drupal/Tests/Composer/Generator/BuilderTest.php
index f402b9d2c977adc4e7e51951ebb9a143371caa57..962486e16a8b93ed1770fcc5e786ff1d2e05635f 100644
--- a/core/tests/Drupal/Tests/Composer/Generator/BuilderTest.php
+++ b/core/tests/Drupal/Tests/Composer/Generator/BuilderTest.php
@@ -49,7 +49,7 @@ public function builderTestData() {
           'license' => 'GPL-2.0-or-later',
           'require' =>
           [
-            'behat/mink' => '1.8.0 | 1.7.1.1 | 1.7.x-dev',
+            'behat/mink' => '^1.8',
           ],
           'conflict' =>
           [
@@ -68,7 +68,7 @@ public function builderTestData() {
           'require' =>
           [
             'drupal/core' => Composer::drupalVersionBranch(),
-            'behat/mink' => '1.8.0 | 1.7.1.1 | 1.7.x-dev',
+            'behat/mink' => 'v1.8.0',
             'symfony/css-selector' => 'v4.3.5',
           ],
           'conflict' =>
diff --git a/core/tests/Drupal/Tests/Composer/Generator/Fixtures.php b/core/tests/Drupal/Tests/Composer/Generator/Fixtures.php
index eccac2c12b30ba4bf3583aa12b1b90083f4003ac..5731a7600dc1f42ce9c0c4e84b339ee2ba1121cb 100644
--- a/core/tests/Drupal/Tests/Composer/Generator/Fixtures.php
+++ b/core/tests/Drupal/Tests/Composer/Generator/Fixtures.php
@@ -38,7 +38,7 @@ protected function composerJson() {
       ],
       'require-dev' =>
       [
-        'behat/mink' => '1.7.x-dev',
+        'behat/mink' => '^1.8',
       ],
     ];
   }
@@ -84,12 +84,12 @@ protected function composerLock() {
       [
         [
           'name' => 'behat/mink',
-          'version' => 'dev-master',
+          'version' => 'v1.8.0',
           'source' =>
           [
             'type' => 'git',
             'url' => 'https://github.com/minkphp/Mink.git',
-            'reference' => 'a534fe7dac9525e8e10ca68e737c3d7e5058ec83',
+            'reference' => 'e1772aabb6b654464264a6cc72158c8b3409d8bc',
           ],
         ],
         [