diff --git a/eo-maven-plugin/src/main/java/org/eolang/maven/OyRemote.java b/eo-maven-plugin/src/main/java/org/eolang/maven/OyRemote.java
index 5334b975de..fd9b262b94 100644
--- a/eo-maven-plugin/src/main/java/org/eolang/maven/OyRemote.java
+++ b/eo-maven-plugin/src/main/java/org/eolang/maven/OyRemote.java
@@ -41,7 +41,7 @@ final class OyRemote implements Objectionary {
     /**
      * The address template.
      */
-    private final String template;
+    private final UrlOy template;
 
     /**
      * Constructor.
@@ -49,22 +49,20 @@ final class OyRemote implements Objectionary {
      * @throws IOException if fails.
      */
     OyRemote(final CommitHash hash) throws IOException {
-        this.template = String.format(
-            "https://raw.githubusercontent.com/objectionary/home/%s/objects/%%s.eo",
+        this.template = new UrlOy(
+            "https://raw.githubusercontent.com/objectionary/home/%s/objects/%s.eo",
             hash.value()
         );
     }
 
     @Override
     public String toString() {
-        return this.template;
+        return this.template.toString();
     }
 
     @Override
     public Input get(final String name) throws MalformedURLException {
-        final URL url = new URL(
-            String.format(this.template, name.replace(".", "/"))
-        );
+        final URL url = this.template.value(name);
         Logger.debug(
             this, "The object '%s' will be pulled from %s...",
             name, url
@@ -72,4 +70,60 @@ public Input get(final String name) throws MalformedURLException {
         return new InputOf(url);
     }
 
+    /**
+     * Objectionary URL template.
+     * Assumes two placeholders in terms of
+     * {@link String#format(String, Object...)}: 1st for version hash,
+     * 2nd for program name.
+     * <br/>Example: "https://raw.githubusercontent.com/objectionary/home/%s/objects/%s.eo"
+     *
+     * @since 1.0
+     */
+    static final class UrlOy {
+
+        /**
+         * URL template. Expects two placeholders in terms of
+         * {@link String#format(String, Object...)}: 1st for hash,
+         * 2nd for program name.
+         * <br/>Example: "https://raw.githubusercontent.com/objectionary/home/%s/objects/%s.eo"
+         */
+        private final String template;
+
+        /**
+         * Objects version hash.
+         */
+        private final String hash;
+
+        /**
+         * Ctor.
+         * @param template URL template.
+         * @param hash Objects version hash.
+         */
+        UrlOy(final String template, final String hash) {
+            this.template = template;
+            this.hash = hash;
+        }
+
+        /**
+         * URL for the program.
+         * @param name Fully qualified EO program name as specified by {@link Place}
+         * @return URL
+         * @throws MalformedURLException in case of incorrect URL
+         */
+        public URL value(final String name) throws MalformedURLException {
+            return new URL(
+                String.format(
+                    this.template,
+                    this.hash,
+                    name.replace(".", "/")
+                )
+            );
+        }
+
+        @Override
+        public String toString() {
+            return this.template;
+        }
+    }
+
 }
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/OyRemoteTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/OyRemoteTest.java
new file mode 100644
index 0000000000..6655b3e77d
--- /dev/null
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/OyRemoteTest.java
@@ -0,0 +1,63 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2022 Objectionary.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.eolang.maven;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test for {@link OyRemote}.
+ *
+ * @since 1.0
+ */
+final class OyRemoteTest {
+
+    @Test
+    void buildsCorrectUrl() throws Exception {
+        MatcherAssert.assertThat(
+            new OyRemote.UrlOy(
+                "https://raw/objectionary/home/%s/objects/%s.eo",
+                "abcde"
+            ).value("org.eolang.app"),
+            Matchers.is(
+                new URL("https://raw/objectionary/home/abcde/objects/org/eolang/app.eo")
+            )
+        );
+    }
+
+    @Test
+    void throwsExceptionOnInvalidUrl() {
+        Assertions.assertThrows(
+            MalformedURLException.class,
+            () -> new OyRemote.UrlOy(
+                "hts:raw.githubusercontent.com/objectionary/home/%s/objects/%s.eo",
+                "abcde"
+            ).value("org.eolang.app")
+        );
+    }
+}