diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/FourNumberVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/FourNumberVersioningSystemTest.java
index 92c57cd..d31dfa9 100644
--- a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/FourNumberVersioningSystemTest.java
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/FourNumberVersioningSystemTest.java
@@ -35,7 +35,7 @@ import static org.junit.jupiter.api.Assertions.fail;
  * Tests the class {@link FourNumberVersioningSystem}.
  */
 @SuppressWarnings({ "unused" })
-@DisplayName("SemanticVersioningSystem")
+@DisplayName("FourNumberVersioningSystem")
 public class FourNumberVersioningSystemTest {
     /**
      * The unit logger for this instance.
diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/OneNumberVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/OneNumberVersioningSystemTest.java
new file mode 100644
index 0000000..d83d81b
--- /dev/null
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/OneNumberVersioningSystemTest.java
@@ -0,0 +1,71 @@
+/*
+ * STAROPENSOURCE ENGINE SOURCE FILE
+ * Copyright (c) 2024 The StarOpenSource Engine Contributors
+ * Licensed under the GNU Affero General Public License v3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.staropensource.sosengine.base.srctests.data.versioning;
+
+import de.staropensource.sosengine.base.data.versioning.OneNumberVersioningSystem;
+import de.staropensource.sosengine.base.data.versioning.TwoNumberVersioningSystem;
+import de.staropensource.sosengine.base.exceptions.InvalidVersionStringException;
+import de.staropensource.sosengine.unittests.UnitLogger;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ * Tests the class {@link TwoNumberVersioningSystem}.
+ */
+@SuppressWarnings({ "unused" })
+@DisplayName("OneNumberVersioningSystem")
+public class OneNumberVersioningSystemTest {
+    /**
+     * The unit logger for this instance.
+     */
+    private static final UnitLogger logger = new UnitLogger(OneNumberVersioningSystemTest.class);
+    private static final Logger log = LoggerFactory.getLogger(OneNumberVersioningSystemTest.class);
+
+    /**
+     * Tests the method {@code compare}.
+     */
+    @ParameterizedTest
+    @DisplayName("compare")
+    @CsvSource({
+            "1, 0, 0",
+            "1, 1, 1",
+            "1, 2, 2",
+    })
+    void testCompare(String a, String b, int expected) throws Throwable {
+        logger.testCall("testCompare", a, b, expected);
+
+        try {
+            assertEquals(expected, new OneNumberVersioningSystem(a).compare(new OneNumberVersioningSystem(b)));
+        } catch (InvalidVersionStringException exception) {
+            logger.error("Got InvalidVersionStringException: " + exception.getMessage());
+            if (exception.getThrowable() != null) {
+                logger.error("Original stack trace:");
+                throw exception.getThrowable();
+            }
+            fail("Got InvalidVersionStringException");
+        }
+    }
+}
diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/StarOpenSourceVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/StarOpenSourceVersioningSystemTest.java
index 93d1940..697e718 100644
--- a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/StarOpenSourceVersioningSystemTest.java
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/StarOpenSourceVersioningSystemTest.java
@@ -34,7 +34,7 @@ import static org.junit.jupiter.api.Assertions.fail;
  * Tests the class {@link SemanticVersioningSystem}.
  */
 @SuppressWarnings({ "unused" })
-@DisplayName("SemanticVersioningSystem")
+@DisplayName("StarOpenSourceVersioningSystem")
 public class StarOpenSourceVersioningSystemTest {
     /**
      * The unit logger for this instance.
diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/ThreeNumberVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/ThreeNumberVersioningSystemTest.java
index cab8198..3583951 100644
--- a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/ThreeNumberVersioningSystemTest.java
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/ThreeNumberVersioningSystemTest.java
@@ -35,7 +35,7 @@ import static org.junit.jupiter.api.Assertions.fail;
  * Tests the class {@link ThreeNumberVersioningSystem}.
  */
 @SuppressWarnings({ "unused" })
-@DisplayName("SemanticVersioningSystem")
+@DisplayName("ThreeNumberVersioningSystem")
 public class ThreeNumberVersioningSystemTest {
     /**
      * The unit logger for this instance.
diff --git a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/TwoNumberVersioningSystemTest.java b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/TwoNumberVersioningSystemTest.java
index e1394e1..cf8bbcb 100644
--- a/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/TwoNumberVersioningSystemTest.java
+++ b/base/src/test/java/de/staropensource/sosengine/base/srctests/data/versioning/TwoNumberVersioningSystemTest.java
@@ -35,7 +35,7 @@ import static org.junit.jupiter.api.Assertions.fail;
  * Tests the class {@link TwoNumberVersioningSystem}.
  */
 @SuppressWarnings({ "unused" })
-@DisplayName("SemanticVersioningSystem")
+@DisplayName("TwoNumberVersioningSystem")
 public class TwoNumberVersioningSystemTest {
     /**
      * The unit logger for this instance.