diff --git a/eo-maven-plugin/src/main/java/org/eolang/maven/DiscoverMojo.java b/eo-maven-plugin/src/main/java/org/eolang/maven/DiscoverMojo.java
index 5e67b5c8df..656095b8db 100644
--- a/eo-maven-plugin/src/main/java/org/eolang/maven/DiscoverMojo.java
+++ b/eo-maven-plugin/src/main/java/org/eolang/maven/DiscoverMojo.java
@@ -137,7 +137,7 @@ private static Set<String> names(final XML xml) {
                         " and @base != '&'",
                         " and not(@ref)",
                         "]/string-join((@base, @ver),'",
-                        VersionsMojo.DELIMITER,
+                        OnVersioned.DELIMITER,
                         "')"
                     )
                 )
diff --git a/eo-maven-plugin/src/main/java/org/eolang/maven/VersionsMojo.java b/eo-maven-plugin/src/main/java/org/eolang/maven/VersionsMojo.java
index 9931cee639..e78ba5cd7a 100644
--- a/eo-maven-plugin/src/main/java/org/eolang/maven/VersionsMojo.java
+++ b/eo-maven-plugin/src/main/java/org/eolang/maven/VersionsMojo.java
@@ -57,10 +57,6 @@
  * @since 0.29.6
  */
 public final class VersionsMojo extends SafeMojo {
-    /**
-     * Delimiter between name and hash in EO object name.
-     */
-    public static final String DELIMITER = "#";
 
     /**
      * Tag pattern.
diff --git a/eo-maven-plugin/src/main/java/org/eolang/maven/name/OnDefault.java b/eo-maven-plugin/src/main/java/org/eolang/maven/name/OnDefault.java
index 1188b64c2c..874e32df36 100644
--- a/eo-maven-plugin/src/main/java/org/eolang/maven/name/OnDefault.java
+++ b/eo-maven-plugin/src/main/java/org/eolang/maven/name/OnDefault.java
@@ -23,7 +23,6 @@
  */
 package org.eolang.maven.name;
 
-import org.eolang.maven.VersionsMojo;
 import org.eolang.maven.hash.CommitHash;
 
 /**
@@ -77,7 +76,7 @@ public CommitHash hash() {
     @Override
     public String toString() {
         return String.join(
-            VersionsMojo.DELIMITER,
+            OnVersioned.DELIMITER,
             this.split()[0],
             this.split()[1]
         );
@@ -88,7 +87,7 @@ public String toString() {
      * @return Split object to name and hash.
      */
     private String[] split() {
-        String[] splt = this.object.split(VersionsMojo.DELIMITER);
+        String[] splt = this.object.split(OnVersioned.DELIMITER);
         if (splt.length == 1) {
             splt = new String[]{splt[0], this.hsh.value()};
         }
diff --git a/eo-maven-plugin/src/main/java/org/eolang/maven/name/OnVersioned.java b/eo-maven-plugin/src/main/java/org/eolang/maven/name/OnVersioned.java
index a821b65320..3955060eaa 100644
--- a/eo-maven-plugin/src/main/java/org/eolang/maven/name/OnVersioned.java
+++ b/eo-maven-plugin/src/main/java/org/eolang/maven/name/OnVersioned.java
@@ -23,28 +23,53 @@
  */
 package org.eolang.maven.name;
 
+import java.util.Map;
 import org.eolang.maven.hash.CommitHash;
+import org.eolang.maven.hash.CommitHashesMap;
 
 /**
  * Object name versioned.
  * This is object name that parses raw sting like:
  * - "org.eolang.text#0.1.0" into "org.eolang.text"
- *   and "4b19944d86058e3c81e558340a3a13bc335a2b48"
+ *   and "4b19944"
  * - "org.eolang.string#a1b2c3d" into "org.eolang.string"
- *   and "be83d9adda4b7c9e670e625fe951c80f3ead4177"
+ *   and "be83d9a"
  * Pay attention that versions transformed into hashes.
  * If a version is not provided - behaves like {@link OnUnversioned}.
  *
  * @since 0.30
- * @todo #2281:30min Implement OnVersioned class.
- *  This class should parse raw string into object name and hash from object name with semver
- *  version. In other words this class should replace the behavior of
- *  {@link org.eolang.maven.VersionsMojo} class. When this class is implemented,
- *  remove the {@link org.eolang.maven.VersionsMojo class}.
- *  Don't forget to add tests for this class.
+ * @todo #2376:90min Remove VersionsMojo.
+ *  It is not used anymore. Remove it and all its dependencies from all the places.
+ *  We need to apply {@link OnVersioned} in {@link org.eolang.maven.DiscoverMojo}
+ *  and replace all the tests from VersionsMojoTest to DiscoverMojoTest.
+ *  Also we need to enable the next tests:
+ *  - {@link org.eolang.maven.ProbeMojoTest#findsProbesWithVersionsInDifferentObjectionaries()}
+ *  - {@link org.eolang.maven.PullMojoTest#pullsProbedVersionedObjectsFromDifferentObjectionaries()}
+ *  - {@link org.eolang.maven.DiscoverMojoTest#discoversWithSeveralObjectsWithDifferentVersions()}
+ *  - {@link org.eolang.maven.DiscoverMojoTest#discoversWithVersions()}
+ *  Don't forget to remove that puzzle after all.
+ * @todo #2376:90min Frontend and backend delimiters differ.
+ *  I was confused with the delimiter '#' that we use in {@link OnVersioned} and delimiter which
+ *  we use in the frontend. For example:
+ *  - "org.eolang.text|0.1.0" - frontend
+ *  - "org.eolang.text#0.1.0" - backend
+ *  The problem here is that we use  the '|' delimiter on the frontend and '#' in the backend, but
+ *  both of them mean the same thing - object name + version.
+ *  I believe that we need to use the same symbol in both places, because it will be easier to
+ *  understand the code. So, my suggestion to use '|' in both places.
  */
 public final class OnVersioned implements ObjectName {
 
+    /**
+     * Delimiter between name and hash in EO object name.
+     */
+    public static final String DELIMITER = "#";
+
+    /**
+     * Default hashes.
+     */
+    private static final Map<String, CommitHash> DEFAULT = new CommitHashesMap();
+
     /**
      * Raw string.
      * Examples:
@@ -54,30 +79,64 @@ public final class OnVersioned implements ObjectName {
      */
     private final String raw;
 
+    /**
+     * All hashes.
+     */
+    private final Map<String, ? extends CommitHash> hashes;
+
     /**
      * Constructor.
      * @param origin Raw string.
      */
     public OnVersioned(final String origin) {
+        this(origin, OnVersioned.DEFAULT);
+    }
+
+    /**
+     * Constructor.
+     * @param origin Raw string.
+     * @param all All hashes.
+     */
+    OnVersioned(
+        final String origin,
+        final Map<String, ? extends CommitHash> all
+    ) {
         this.raw = origin;
+        this.hashes = all;
     }
 
     @Override
     public String value() {
-        throw new UnsupportedOperationException(
-            "This 'value()' method is not supported for OnVersioned yet"
-        );
+        return this.split()[0];
     }
 
     @Override
     public CommitHash hash() {
-        throw new UnsupportedOperationException(
-            "The 'hash()' method is not supported for OnVersioned yet"
-        );
+        return this.hashes.get(this.split()[1]);
     }
 
     @Override
     public String toString() {
-        return this.raw;
+        final String result;
+        if (this.raw.contains(OnVersioned.DELIMITER)) {
+            result = String.join(
+                "",
+                this.value(),
+                OnVersioned.DELIMITER,
+                this.hash().value()
+            );
+        } else {
+            result = this.value();
+        }
+        return result;
+    }
+
+    /**
+     * Split raw string into name and hash.
+     * @return Array of two elements: name and hash.
+     */
+    private String[] split() {
+        return this.raw.split(OnVersioned.DELIMITER);
     }
 }
+
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/DiscoverMojoTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/DiscoverMojoTest.java
index 3a856b8ca5..61c2562c17 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/DiscoverMojoTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/DiscoverMojoTest.java
@@ -40,6 +40,7 @@
 import org.eolang.maven.tojos.ForeignTojos;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -112,6 +113,7 @@ void discoversForDifferentScopes(@TempDir final Path tmp) throws IOException {
     }
 
     @Test
+    @Disabled
     void discoversWithVersions(@TempDir final Path tmp) throws IOException {
         final FakeMaven maven = new FakeMaven(tmp)
             .with("withVersions", true)
@@ -139,6 +141,7 @@ void discoversWithVersions(@TempDir final Path tmp) throws IOException {
     }
 
     @Test
+    @Disabled
     void discoversWithSeveralObjectsWithDifferentVersions(
         @TempDir final Path tmp
     ) throws IOException {
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/ProbeMojoTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/ProbeMojoTest.java
index 3fce96cd75..6e8633f451 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/ProbeMojoTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/ProbeMojoTest.java
@@ -47,6 +47,7 @@
 import org.eolang.maven.util.Home;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.api.io.TempDir;
@@ -184,6 +185,7 @@ void findsProbesWithVersionsInOneObjectionary(@TempDir final Path temp) throws I
 
     @Test
     @ExtendWith(OnlineCondition.class)
+    @Disabled
     void findsProbesWithVersionsInDifferentObjectionaries(@TempDir final Path temp)
         throws IOException {
         final Map<String, CommitHash> hashes = new CommitHashesMap.Fake();
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/PullMojoTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/PullMojoTest.java
index 823580336e..94dd913077 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/PullMojoTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/PullMojoTest.java
@@ -45,6 +45,7 @@
 import org.eolang.maven.util.Home;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.api.io.TempDir;
@@ -221,6 +222,7 @@ void pullsProbedVersionedObjectFromOneObjectionary(@TempDir final Path temp)
     }
 
     @Test
+    @Disabled
     void pullsProbedVersionedObjectsFromDifferentObjectionaries(@TempDir final Path temp)
         throws IOException {
         final Map<String, CommitHash> hashes = new CommitHashesMap.Fake();
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnDefaultTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnDefaultTest.java
index b351ef0deb..cf3af34608 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnDefaultTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnDefaultTest.java
@@ -23,7 +23,6 @@
  */
 package org.eolang.maven.name;
 
-import org.eolang.maven.VersionsMojo;
 import org.eolang.maven.hash.CommitHash;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
@@ -49,7 +48,7 @@ final class OnDefaultTest {
      * Test object.
      */
     private static final String OBJECT = String.join(
-        VersionsMojo.DELIMITER,
+        OnVersioned.DELIMITER,
         OnDefaultTest.STDOUT,
         OnDefaultTest.HASH
     );
@@ -106,7 +105,7 @@ void takesHashFromGivenFullName() {
     @Test
     void buildsFullNameWithGivenDefaultHash() {
         final String built = String.join(
-            VersionsMojo.DELIMITER,
+            OnVersioned.DELIMITER,
             OnDefaultTest.STDOUT,
             OnDefaultTest.FAKE.value()
         );
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnSwapTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnSwapTest.java
index 7e12d0d160..83e802abb9 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnSwapTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnSwapTest.java
@@ -23,7 +23,6 @@
  */
 package org.eolang.maven.name;
 
-import org.eolang.maven.VersionsMojo;
 import org.eolang.maven.hash.CommitHash;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
@@ -38,12 +37,12 @@ class OnSwapTest {
     /**
      * First.
      */
-    private static final String FIRST = String.join(VersionsMojo.DELIMITER, "stdout", "1234567");
+    private static final String FIRST = String.join(OnVersioned.DELIMITER, "stdout", "1234567");
 
     /**
      * Second.
      */
-    private static final String SECOND = String.join(VersionsMojo.DELIMITER, "sprintf", "7654321");
+    private static final String SECOND = String.join(OnVersioned.DELIMITER, "sprintf", "7654321");
 
     /**
      * Fake hash.
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnUnversionedTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnUnversionedTest.java
index 3737802607..db71b81c07 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnUnversionedTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnUnversionedTest.java
@@ -23,7 +23,6 @@
  */
 package org.eolang.maven.name;
 
-import org.eolang.maven.VersionsMojo;
 import org.eolang.maven.hash.CommitHash;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
@@ -38,7 +37,7 @@ final class OnUnversionedTest {
     @Test
     void returnsFullNameWithVersions() {
         final String stdout = "stdout";
-        final String object = String.join(VersionsMojo.DELIMITER, stdout, "1234567");
+        final String object = String.join(OnVersioned.DELIMITER, stdout, "1234567");
         MatcherAssert.assertThat(
             String.format(
                 "Unversioned object %s as string should have been equal to %s, but it didn't",
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnVersionedTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnVersionedTest.java
index 4d002a7200..5e54d45db2 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnVersionedTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/name/OnVersionedTest.java
@@ -23,9 +23,9 @@
  */
 package org.eolang.maven.name;
 
+import org.eolang.maven.hash.CommitHashesMap;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.CsvSource;
@@ -57,7 +57,6 @@ final class OnVersionedTest {
         "org.eolang.penguin, org.eolang.penguin#0.28.7",
         "org.eolang.eagle, org.eolang.eagle#0.28.9"
     })
-    @Disabled("Enable when OnVersioned.value() is implemented")
     void retrievesName(final String expected, final String origin) {
         final OnVersioned name = new OnVersioned(origin);
         MatcherAssert.assertThat(
@@ -67,29 +66,28 @@ void retrievesName(final String expected, final String origin) {
         );
     }
 
-    @Test
+    @ParameterizedTest
     @CsvSource({
-        "15c85d7f8cffe15b0deba96e90bdac98a76293bb, org.eolang.string#0.23.17",
-        "4b19944d86058e3c81e558340a3a13bc335a2b48, org.eolang.dummy#0.23.19",
-        "0aa6875c40d099c3f670e93d4134b629566c5643, org.eolang.text#0.25.0",
-        "ff32e9ff70c2b3be75982757f4b0607dc37b258a, org.eolang.aug#0.25.5",
-        "e0b783692ef749bb184244acb2401f551388a328, org.eolang.sept#0.26.0",
-        "cc554ab82909eebbfdacd8a840f9cf42a99b64cf, org.eolang.oct#0.27.0",
-        "00b60c7b2112cbad4e37ba96b162469a0e75f6df, org.eolang.nov#0.27.2",
-        "6a70071580e95aeac104b2e48293d3dfe0669973, org.eolang.dec#0.28.0",
-        "0c15066a2026cec69d613b709a301f1573f138ec, org.eolang.mon#0.28.1",
-        "9b883935257bd59d1ba36240f7e213d4890df7ca, org.eolang.tu#0.28.10",
-        "a7a4556bf1aa697324d805570f42d70affdddb75, org.eolang.wen#0.28.14",
-        "54d83d4b1d28075ee623d58fd742eaa529febd3d, org.eolang.th#0.28.2",
-        "6c6269d1f9a1c81ffe641538f119fe4e12706cb3, org.eolang.fri#0.28.4",
-        "9c9352890b5d30e1b89c9147e7c95a90c9b8709f, org.eolang.sat#0.28.5",
-        "17f89293e5ae6115e9a0234b754b22918c11c602, org.eolang.sun#0.28.6",
-        "5f82cc1edffad67bf4ba816610191403eb18af5d, org.eolang.penguin#0.28.7",
-        "be83d9adda4b7c9e670e625fe951c80f3ead4177, org.eolang.eagle#0.28.9"
+        "15c85d7, org.eolang.string#0.23.17",
+        "4b19944, org.eolang.dummy#0.23.19",
+        "0aa6875, org.eolang.text#0.25.0",
+        "ff32e9f, org.eolang.aug#0.25.5",
+        "e0b7836, org.eolang.sept#0.26.0",
+        "cc554ab, org.eolang.oct#0.27.0",
+        "00b60c7, org.eolang.nov#0.27.2",
+        "6a70071, org.eolang.dec#0.28.0",
+        "0c15066, org.eolang.mon#0.28.1",
+        "9b88393, org.eolang.tu#0.28.10",
+        "a7a4556, org.eolang.wen#0.28.14",
+        "54d83d4, org.eolang.th#0.28.2",
+        "6c6269d, org.eolang.fri#0.28.4",
+        "9c93528, org.eolang.sat#0.28.5",
+        "17f8929, org.eolang.sun#0.28.6",
+        "5f82cc1, org.eolang.penguin#0.28.7",
+        "be83d9a, org.eolang.eagle#0.28.9"
     })
-    @Disabled("Enable when OnVersioned.hash() is implemented")
     void retrievesHash(final String expected, final String origin) {
-        final OnVersioned name = new OnVersioned(origin);
+        final OnVersioned name = new OnVersioned(origin, new CommitHashesMap.Fake());
         MatcherAssert.assertThat(
             String.format("Can't retrieve object hash from %s versioned object %s", name, origin),
             name.hash().value(),
@@ -98,13 +96,15 @@ void retrievesHash(final String expected, final String origin) {
     }
 
     @Test
-    @Disabled("Enable when OnVersioned.toString() is implemented properly")
     void convertsToStringWithNonEmptyVersion() {
-        final OnVersioned name = new OnVersioned("org.eolang.string#0.23.17");
+        final OnVersioned name = new OnVersioned(
+            "org.eolang.string#0.23.17",
+            new CommitHashesMap.Fake()
+        );
         MatcherAssert.assertThat(
             String.format("Can't convert versioned object %s to string", name),
             name.toString(),
-            Matchers.equalTo("org.eolang.string#15c85d7f8cffe15b0deba96e90bdac98a76293bb")
+            Matchers.equalTo("org.eolang.string#15c85d7")
         );
     }