diff --git a/pom.xml b/pom.xml
index a4257d9c78..88e29f51df 100644
--- a/pom.xml
+++ b/pom.xml
@@ -260,6 +260,7 @@
         <dependency>
             <groupId>com.jcabi</groupId>
             <artifactId>jcabi-http</artifactId>
+            <version>1.10.2</version>
         </dependency>
         <dependency>
             <groupId>com.jcabi</groupId>
@@ -278,7 +279,7 @@
         <dependency>
             <groupId>com.jcabi</groupId>
             <artifactId>jcabi-github</artifactId>
-            <version>0.18.7</version>
+            <version>0.18.9</version>
         </dependency>
         <dependency>
             <groupId>com.jcabi</groupId>
diff --git a/src/main/java/com/rultor/agents/twitter/Tweets.java b/src/main/java/com/rultor/agents/twitter/Tweets.java
index 82a5cbbb1a..12060512a6 100644
--- a/src/main/java/com/rultor/agents/twitter/Tweets.java
+++ b/src/main/java/com/rultor/agents/twitter/Tweets.java
@@ -126,7 +126,7 @@ private static String tweet(final Repo.Smart repo, final String tag)
             .append(" released https://github.com/")
             .append(repo.coordinates());
         for (final Language lang : repo.languages()) {
-            text.append(String.format(" #%s", lang));
+            text.append(String.format(" #%s", lang.name()));
         }
         return text.toString();
     }
diff --git a/src/test/java/com/rultor/agents/twitter/TweetsTest.java b/src/test/java/com/rultor/agents/twitter/TweetsTest.java
index 2e8c44ecdb..7654364ff1 100644
--- a/src/test/java/com/rultor/agents/twitter/TweetsTest.java
+++ b/src/test/java/com/rultor/agents/twitter/TweetsTest.java
@@ -29,22 +29,15 @@
  */
 package com.rultor.agents.twitter;
 
-import com.google.common.collect.Lists;
-import com.jcabi.github.Coordinates;
-import com.jcabi.github.Github;
+import com.google.common.base.Function;
+import com.google.common.base.Joiner;
+import com.google.common.collect.Iterables;
 import com.jcabi.github.Issue;
-import com.jcabi.github.Issues;
 import com.jcabi.github.Language;
 import com.jcabi.github.Repo;
-import com.jcabi.github.Repos;
 import com.jcabi.github.mock.MkGithub;
-import com.rultor.spi.Agent;
 import com.rultor.spi.Talk;
 import java.io.IOException;
-import java.util.List;
-import javax.json.Json;
-import javax.json.JsonObject;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.mockito.Matchers;
 import org.mockito.Mockito;
@@ -56,10 +49,6 @@
  * @author Yegor Bugayenko (yegor@tpc2.com)
  * @version $Id$
  * @since 1.30
- * @todo #561 When all the puzzles from
- *  https://github.com/jcabi/jcabi-github/issues/923 are implemented, remove
- *  repo, issue, lang methods, and use MkGithub family in all the tests. Also
- *  enable postsTweet method.
  */
 public final class TweetsTest {
 
@@ -68,14 +57,11 @@ public final class TweetsTest {
      * @throws Exception In case of error.
      */
     @Test
-    @Ignore
     public void postsTweet() throws Exception {
         final Repo repo = new MkGithub().randomRepo();
-        final Issue issue = repo.issues().create("", "");
         final Twitter twitter = Mockito.mock(Twitter.class);
-        final Agent agent = new Tweets(repo.github(), twitter);
-        final Talk talk = this.talk(repo, issue);
-        agent.execute(talk);
+        final Talk talk = TweetsTest.talk(repo, repo.issues().create("", ""));
+        new Tweets(repo.github(), twitter).execute(talk);
         Mockito.verify(twitter).post(
             Matchers.contains("test")
         );
@@ -87,57 +73,28 @@ public void postsTweet() throws Exception {
      */
     @Test
     public void postsTweetWithLanguages() throws Exception {
-        final Repo repo = this.repo();
-        final List<Language> langs = Lists.newArrayList(
-            this.lang("Java"), this.lang("Python")
-        );
-        Mockito.when(repo.languages()).thenReturn(langs);
+        final Repo repo = new MkGithub().randomRepo();
         final Twitter twitter = Mockito.mock(Twitter.class);
-        final Agent agent = new Tweets(repo.github(), twitter);
-        final Talk talk = this.talk(repo, this.issue(repo));
-        agent.execute(talk);
+        new Tweets(repo.github(), twitter).execute(
+            TweetsTest.talk(repo, repo.issues().create("", ""))
+        );
         Mockito.verify(twitter).post(
             Matchers.contains(
-                String.format("#%s #%s", langs.get(0), langs.get(1))
+                Joiner.on(' ').join(
+                    Iterables.transform(
+                        repo.languages(),
+                        new Function<Language, String>() {
+                            @Override
+                            public String apply(final Language lang) {
+                                return String.format("#%s", lang.name());
+                            }
+                        }
+                    )
+                )
             )
         );
     }
 
-    /**
-     * Create mock issue.
-     * @param repo Repo to use
-     * @return Mocked issue.
-     */
-    private Issue issue(final Repo repo) {
-        final Issues issues = Mockito.mock(Issues.class);
-        final Issue issue = Mockito.mock(Issue.class);
-        Mockito.when(issue.repo()).thenReturn(repo);
-        Mockito.when(issues.get(Mockito.anyInt())).thenReturn(issue);
-        Mockito.when(repo.issues()).thenReturn(issues);
-        return issue;
-    }
-
-    /**
-     * Create mock repo.
-     * @return Mocked repo
-     * @throws IOException In case of error
-     */
-    private Repo repo() throws IOException {
-        final Github github = Mockito.mock(Github.class);
-        final Repo repo = Mockito.mock(Repo.class);
-        final JsonObject rjson = Json.createObjectBuilder()
-            .add("description", "something").build();
-        Mockito.when(repo.json()).thenReturn(rjson);
-        Mockito.when(repo.github()).thenReturn(github);
-        final Repos repos = Mockito.mock(Repos.class);
-        Mockito.when(github.repos()).thenReturn(repos);
-        final Coordinates coords = new Coordinates.Simple("foo/bar");
-        Mockito.when(repo.coordinates()).thenReturn(coords);
-        Mockito.when(repos.get(Mockito.any(Coordinates.class)))
-            .thenReturn(repo);
-        return repo;
-    }
-
     /**
      * Creates a talk with repo and issue.
      * @param repo Repo to use
@@ -145,7 +102,8 @@ private Repo repo() throws IOException {
      * @return Created Talk
      * @throws IOException In case of error
      */
-    private Talk talk(final Repo repo, final Issue issue) throws IOException {
+    private static Talk talk(final Repo repo, final Issue issue)
+        throws IOException {
         final Talk talk = new Talk.InFile();
         talk.modify(
             new Directives().xpath("/talk").add("wire")
@@ -161,22 +119,4 @@ private Talk talk(final Repo repo, final Issue issue) throws IOException {
         );
         return talk;
     }
-
-    /**
-     * Create mock language.
-     * @param name Name of the language
-     * @return Language created.
-     */
-    private Language lang(final String name) {
-        return new Language() {
-            @Override
-            public String name() {
-                return name;
-            }
-            @Override
-            public long bytes() {
-                return 0;
-            }
-        };
-    }
 }