diff --git a/.travis.yml b/.travis.yml
index d478d7a213..8d284a7a12 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,11 +28,11 @@ matrix:
           env: deps=high
         - php: 7.4
           env: deps=low
-        - php: nightly
+        - php: 8.0snapshot
           services: [memcached]
     fast_finish: true
     allow_failures:
-        - php: nightly
+        - php: 8.0snapshot
           services: [memcached]
 
 cache:
@@ -140,7 +140,7 @@ before_install:
           echo session.gc_probability = 0 >> $INI
           echo opcache.enable_cli = 1 >> $INI
           echo apc.enable_cli = 1 >> $INI
-          if [[ $PHP != nightly ]]; then
+          if [[ $PHP != 8.* ]]; then
               echo extension = memcached.so >> $INI
           fi
       done
@@ -156,7 +156,7 @@ before_install:
           if ! php --ri sodium > /dev/null; then
               tfold ext.libsodium tpecl libsodium sodium.so $INI
           fi
-          if [[ $PHP = nightly ]]; then
+          if [[ $PHP = 8.* ]]; then
               tfold ext.memcached tpecl memcached-3.1.5 memcached.so $INI
           else
               tfold ext.mongodb tpecl mongodb-1.6.16 mongodb.so $INI
@@ -234,7 +234,7 @@ install:
 
     - |
       # Set composer's platform to php 7.4 if we're on php 8.
-      if [[ $PHP = nightly ]]; then
+      if [[ $PHP = 8.* ]]; then
           composer config platform.php 7.4.99
           export SYMFONY_DEPRECATIONS_HELPER=max[total]=999
       fi
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php
index 693883ed78..c5075041b4 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php
@@ -123,7 +123,7 @@ class SymfonyTestsListenerTrait
         $suiteName = $suite->getName();
 
         foreach ($suite->tests() as $test) {
-            if (!($test instanceof \PHPUnit\Framework\TestCase || $test instanceof TestCase)) {
+            if (!($test instanceof \PHPUnit_Framework_TestCase || $test instanceof TestCase)) {
                 continue;
             }
             if (null === Test::getPreserveGlobalStateSettings(\get_class($test), $test->getName(false))) {
@@ -158,7 +158,7 @@ class SymfonyTestsListenerTrait
             $testSuites = [$suite];
             for ($i = 0; isset($testSuites[$i]); ++$i) {
                 foreach ($testSuites[$i]->tests() as $test) {
-                    if ($test instanceof TestSuite) {
+                    if ($test instanceof \PHPUnit_Framework_TestSuite || $test instanceof TestSuite) {
                         if (!class_exists($test->getName(), false)) {
                             $testSuites[] = $test;
                             continue;
@@ -174,12 +174,19 @@ class SymfonyTestsListenerTrait
                 }
             }
         } elseif (2 === $this->state) {
+            $suites = [$suite];
             $skipped = [];
-            foreach ($suite->tests() as $test) {
-                if (!($test instanceof \PHPUnit\Framework\TestCase || $test instanceof TestCase)
-                    || isset($this->wasSkipped[$suiteName]['*'])
-                    || isset($this->wasSkipped[$suiteName][$test->getName()])) {
-                    $skipped[] = $test;
+            while ($s = array_shift($suites)) {
+                foreach ($s->tests() as $test) {
+                    if ($test instanceof \PHPUnit_Framework_TestSuite || $test instanceof TestSuite) {
+                        $suites[] = $test;
+                        continue
+                    }
+                    if (($test instanceof \PHPUnit_Framework_TestCase || $test instanceof TestCase)
+                        && isset($this->wasSkipped[\get_class($test)][$test->getName()])
+                    ) {
+                        $skipped[] = $test;
+                    }
                 }
             }
             $suite->setTests($skipped);
@@ -189,21 +196,13 @@ class SymfonyTestsListenerTrait
     public function addSkippedTest($test, \Exception $e, $time)
     {
         if (0 < $this->state) {
-            if ($test instanceof \PHPUnit\Framework\TestCase || $test instanceof TestCase) {
-                $class = \get_class($test);
-                $method = $test->getName();
-            } else {
-                $class = $test->getName();
-                $method = '*';
-            }
-
-            $this->isSkipped[$class][$method] = 1;
+            $this->isSkipped[\get_class($test)][$test->getName()] = 1;
         }
     }
 
     public function startTest($test)
     {
-        if (-2 < $this->state && ($test instanceof \PHPUnit\Framework\TestCase || $test instanceof TestCase)) {
+        if (-2 < $this->state && ($test instanceof \PHPUnit_Framework_TestCase || $test instanceof TestCase)) {
             // This event is triggered before the test is re-run in isolation
             if ($this->willBeIsolated($test)) {
                 $this->runsInSeparateProcess = tempnam(sys_get_temp_dir(), 'deprec');
@@ -313,7 +312,7 @@ class SymfonyTestsListenerTrait
             self::$expectedDeprecations = self::$gatheredDeprecations = [];
             self::$previousErrorHandler = null;
         }
-        if (!$this->runsInSeparateProcess && -2 < $this->state && ($test instanceof \PHPUnit\Framework\TestCase || $test instanceof TestCase)) {
+        if (!$this->runsInSeparateProcess && -2 < $this->state && ($test instanceof \PHPUnit_Framework_TestCase || $test instanceof TestCase)) {
             if (\in_array('time-sensitive', $groups, true)) {
                 ClockMock::withClockMock(false);
             }
diff --git a/src/Symfony/Component/Intl/Tests/DateFormatter/Verification/IntlDateFormatterTest.php b/src/Symfony/Component/Intl/Tests/DateFormatter/Verification/IntlDateFormatterTest.php
index 50cccd993b..ed82ead532 100644
--- a/src/Symfony/Component/Intl/Tests/DateFormatter/Verification/IntlDateFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/DateFormatter/Verification/IntlDateFormatterTest.php
@@ -30,6 +30,18 @@ class IntlDateFormatterTest extends AbstractIntlDateFormatterTest
         parent::setUp();
     }
 
+    /**
+     * @dataProvider formatProvider
+     */
+    public function testFormat($pattern, $timestamp, $expected)
+    {
+        if (\PHP_VERSION_ID < 70105 && $timestamp instanceof \DateTimeImmutable) {
+            $this->markTestSkipped('PHP >= 7.1.5 required for DateTimeImmutable.');
+        }
+
+        parent::testFormat($pattern, $timestamp, $expected);
+    }
+
     /**
      * @dataProvider formatTimezoneProvider
      */