diff --git a/pgpainless-core/src/test/java/org/pgpainless/algorithm/RevocationStateTest.java b/pgpainless-core/src/test/java/org/pgpainless/algorithm/RevocationStateTest.java
index c24084b4..f5189eb9 100644
--- a/pgpainless-core/src/test/java/org/pgpainless/algorithm/RevocationStateTest.java
+++ b/pgpainless-core/src/test/java/org/pgpainless/algorithm/RevocationStateTest.java
@@ -22,6 +22,13 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class RevocationStateTest {
 
+    @Test
+    public void softRevokedRequiresDate() {
+        // noinspection DataFlowIssue, ResultOfMethodCallIgnored
+        assertThrows(NullPointerException.class, () ->
+                RevocationState.softRevoked(null));
+    }
+
     @Test
     public void testNotRevoked() {
         RevocationState state = RevocationState.notRevoked();