diff --git a/pgpainless-core/src/test/java/org/junit/JUtils.java b/pgpainless-core/src/test/java/org/junit/JUtils.java
new file mode 100644
index 00000000..c053027f
--- /dev/null
+++ b/pgpainless-core/src/test/java/org/junit/JUtils.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.junit;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class JUtils {
+
+    public static void assertEquals(long a, long b, long delta) {
+        assertTrue(a - delta <= b && a + delta >= b);
+    }
+}
diff --git a/pgpainless-core/src/test/java/org/pgpainless/key/generation/GenerateKeyWithAdditionalUserIdTest.java b/pgpainless-core/src/test/java/org/pgpainless/key/generation/GenerateKeyWithAdditionalUserIdTest.java
index 2eb77269..afecc5a3 100644
--- a/pgpainless-core/src/test/java/org/pgpainless/key/generation/GenerateKeyWithAdditionalUserIdTest.java
+++ b/pgpainless-core/src/test/java/org/pgpainless/key/generation/GenerateKeyWithAdditionalUserIdTest.java
@@ -29,6 +29,7 @@ import org.bouncycastle.bcpg.ArmoredOutputStream;
 import org.bouncycastle.openpgp.PGPException;
 import org.bouncycastle.openpgp.PGPPublicKeyRing;
 import org.bouncycastle.openpgp.PGPSecretKeyRing;
+import org.junit.JUtils;
 import org.junit.jupiter.api.Test;
 import org.pgpainless.PGPainless;
 import org.pgpainless.algorithm.KeyFlag;
@@ -42,7 +43,7 @@ public class GenerateKeyWithAdditionalUserIdTest {
     @Test
     public void test() throws InvalidAlgorithmParameterException, NoSuchAlgorithmException, PGPException, IOException {
         Date now = new Date();
-        Date expiration = new Date(now.getTime() + 1000 * 5);
+        Date expiration = new Date(now.getTime() + 1000 * 60);
         PGPSecretKeyRing secretKeys = PGPainless.generateKeyRing()
                 .withPrimaryKey(KeySpec.getBuilder(KeyType.RSA(RsaLength._3072))
                         .withKeyFlags(KeyFlag.CERTIFY_OTHER, KeyFlag.SIGN_DATA, KeyFlag.ENCRYPT_COMMS)
@@ -56,7 +57,7 @@ public class GenerateKeyWithAdditionalUserIdTest {
                 .build();
         PGPPublicKeyRing publicKeys = KeyRingUtils.publicKeyRingFrom(secretKeys);
 
-        assertEquals(expiration.getTime(), PGPainless.inspectKeyRing(publicKeys).getExpirationDate().getTime(), 2);
+        JUtils.assertEquals(expiration.getTime(), PGPainless.inspectKeyRing(publicKeys).getExpirationDate().getTime(),2000);
 
         Iterator<String> userIds = publicKeys.getPublicKey().getUserIDs();
         assertEquals("primary@user.id", userIds.next());