diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorAgeRestrictedTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorAgeRestrictedTest.java
index b907bcec..5ee83f56 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorAgeRestrictedTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorAgeRestrictedTest.java
@@ -29,6 +29,7 @@ public class YoutubeStreamExtractorAgeRestrictedTest extends DefaultStreamExtrac
     public static void setUp() throws Exception {
         YoutubeParsingHelper.resetClientVersionAndKey();
         YoutubeParsingHelper.setNumberGenerator(new Random(1));
+        YoutubeParsingHelper.setSeedForVideoTests();
         YoutubeStreamExtractor.resetDeobfuscationCode();
         NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "ageRestricted"));
         extractor = YouTube.getStreamExtractor(URL);
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorControversialTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorControversialTest.java
index 824dac65..4f692fd3 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorControversialTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorControversialTest.java
@@ -33,6 +33,7 @@ public class YoutubeStreamExtractorControversialTest extends DefaultStreamExtrac
     public static void setUp() throws Exception {
         YoutubeParsingHelper.resetClientVersionAndKey();
         YoutubeParsingHelper.setNumberGenerator(new Random(1));
+        YoutubeParsingHelper.setSeedForVideoTests();
         YoutubeStreamExtractor.resetDeobfuscationCode();
         NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "controversial"));
         extractor = YouTube.getStreamExtractor(URL);
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorDefaultTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorDefaultTest.java
index e8681e5b..95024aec 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorDefaultTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorDefaultTest.java
@@ -1,3 +1,23 @@
+/*
+ * Created by Christian Schabesberger on 30.12.15.
+ *
+ * Copyright (C) Christian Schabesberger 2015 <chris.schabesberger@mailbox.org>
+ * YoutubeVideoExtractorDefault.java is part of NewPipe Extractor.
+ *
+ * NewPipe Extractor is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * NewPipe Extractor is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with NewPipe Extractor. If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package org.schabi.newpipe.extractor.services.youtube.stream;
 
 import org.junit.jupiter.api.BeforeAll;
@@ -35,25 +55,6 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.schabi.newpipe.extractor.ServiceList.YouTube;
 import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 
-/*
- * Created by Christian Schabesberger on 30.12.15.
- *
- * Copyright (C) Christian Schabesberger 2015 <chris.schabesberger@mailbox.org>
- * YoutubeVideoExtractorDefault.java is part of NewPipe.
- *
- * NewPipe is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * NewPipe is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
- */
 public class YoutubeStreamExtractorDefaultTest {
     private static final String RESOURCE_PATH = DownloaderFactory.RESOURCE_PATH + "services/youtube/extractor/stream/";
     static final String BASE_URL = "https://www.youtube.com/watch?v=";
@@ -64,6 +65,7 @@ public class YoutubeStreamExtractorDefaultTest {
         public static void setUp() throws IOException {
             YoutubeParsingHelper.resetClientVersionAndKey();
             YoutubeParsingHelper.setNumberGenerator(new Random(1));
+            YoutubeParsingHelper.setSeedForVideoTests();
             YoutubeStreamExtractor.resetDeobfuscationCode();
             NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "notAvailable"));
         }
@@ -121,6 +123,7 @@ public class YoutubeStreamExtractorDefaultTest {
         public static void setUp() throws Exception {
             YoutubeParsingHelper.resetClientVersionAndKey();
             YoutubeParsingHelper.setNumberGenerator(new Random(1));
+            YoutubeParsingHelper.setSeedForVideoTests();
             YoutubeStreamExtractor.resetDeobfuscationCode();
             NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "pewdiwpie"));
             extractor = YouTube.getStreamExtractor(URL);
@@ -166,6 +169,7 @@ public class YoutubeStreamExtractorDefaultTest {
         public static void setUp() throws Exception {
             YoutubeParsingHelper.resetClientVersionAndKey();
             YoutubeParsingHelper.setNumberGenerator(new Random(1));
+            YoutubeParsingHelper.setSeedForVideoTests();
             YoutubeStreamExtractor.resetDeobfuscationCode();
             NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "unboxing"));
             extractor = YouTube.getStreamExtractor(URL);
@@ -221,6 +225,7 @@ public class YoutubeStreamExtractorDefaultTest {
         public static void setUp() throws Exception {
             YoutubeParsingHelper.resetClientVersionAndKey();
             YoutubeParsingHelper.setNumberGenerator(new Random(1));
+            YoutubeParsingHelper.setSeedForVideoTests();
             YoutubeStreamExtractor.resetDeobfuscationCode();
             NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "ratingsDisabled"));
             extractor = YouTube.getStreamExtractor(URL);
@@ -259,6 +264,7 @@ public class YoutubeStreamExtractorDefaultTest {
         public static void setUp() throws Exception {
             YoutubeParsingHelper.resetClientVersionAndKey();
             YoutubeParsingHelper.setNumberGenerator(new Random(1));
+            YoutubeParsingHelper.setSeedForVideoTests();
             YoutubeStreamExtractor.resetDeobfuscationCode();
             NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "streamSegmentsTagesschau"));
             extractor = YouTube.getStreamExtractor(URL);
@@ -392,9 +398,10 @@ public class YoutubeStreamExtractorDefaultTest {
         public static void setUp() throws Exception {
             YoutubeParsingHelper.resetClientVersionAndKey();
             YoutubeParsingHelper.setNumberGenerator(new Random(1));
+            YoutubeParsingHelper.setSeedForVideoTests();
+            YoutubeStreamExtractor.resetDeobfuscationCode();
             NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "publicBroadcast"));
             extractor = YouTube.getStreamExtractor(URL);
-            YoutubeStreamExtractor.resetDeobfuscationCode();
             extractor.fetchPage();
         }
 
@@ -445,6 +452,9 @@ public class YoutubeStreamExtractorDefaultTest {
 
         @BeforeAll
         public static void setUp() throws Exception {
+            YoutubeParsingHelper.resetClientVersionAndKey();
+            YoutubeParsingHelper.setNumberGenerator(new Random(1));
+            YoutubeParsingHelper.setSeedForVideoTests();
             YoutubeStreamExtractor.resetDeobfuscationCode();
             NewPipe.init(DownloaderTestImpl.getInstance());
             extractor = (YoutubeStreamExtractor) YouTube
@@ -465,6 +475,9 @@ public class YoutubeStreamExtractorDefaultTest {
 
         @BeforeAll
         public static void setUp() throws Exception {
+            YoutubeParsingHelper.resetClientVersionAndKey();
+            YoutubeParsingHelper.setNumberGenerator(new Random(1));
+            YoutubeParsingHelper.setSeedForVideoTests();
             YoutubeStreamExtractor.resetDeobfuscationCode();
             NewPipe.init(DownloaderTestImpl.getInstance());
             extractor = YouTube.getStreamExtractor(URL);
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorLivestreamTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorLivestreamTest.java
index 2ec36582..78743241 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorLivestreamTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorLivestreamTest.java
@@ -30,6 +30,7 @@ public class YoutubeStreamExtractorLivestreamTest extends DefaultStreamExtractor
     public static void setUp() throws Exception {
         YoutubeParsingHelper.resetClientVersionAndKey();
         YoutubeParsingHelper.setNumberGenerator(new Random(1));
+        YoutubeParsingHelper.setSeedForVideoTests();
         YoutubeStreamExtractor.resetDeobfuscationCode();
         NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "live"));
         extractor = YouTube.getStreamExtractor(URL);
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorRelatedMixTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorRelatedMixTest.java
index 916375ae..f414276a 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorRelatedMixTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorRelatedMixTest.java
@@ -42,6 +42,7 @@ public class YoutubeStreamExtractorRelatedMixTest extends DefaultStreamExtractor
     public static void setUp() throws Exception {
         YoutubeParsingHelper.resetClientVersionAndKey();
         YoutubeParsingHelper.setNumberGenerator(new Random(1));
+        YoutubeParsingHelper.setSeedForVideoTests();
         YoutubeStreamExtractor.resetDeobfuscationCode();
         NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "relatedMix"));
         extractor = YouTube.getStreamExtractor(URL);
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorUnlistedTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorUnlistedTest.java
index 634391d0..800676cc 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorUnlistedTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorUnlistedTest.java
@@ -29,6 +29,7 @@ public class YoutubeStreamExtractorUnlistedTest extends DefaultStreamExtractorTe
     public static void setUp() throws Exception {
         YoutubeParsingHelper.resetClientVersionAndKey();
         YoutubeParsingHelper.setNumberGenerator(new Random(1));
+        YoutubeParsingHelper.setSeedForVideoTests();
         YoutubeStreamExtractor.resetDeobfuscationCode();
         NewPipe.init(DownloaderFactory.getDownloader(RESOURCE_PATH + "unlisted"));
         extractor = YouTube.getStreamExtractor(URL);