diff --git a/lib/fbe/fake_octokit.rb b/lib/fbe/fake_octokit.rb
index 960ed74..ab434df 100644
--- a/lib/fbe/fake_octokit.rb
+++ b/lib/fbe/fake_octokit.rb
@@ -401,6 +401,12 @@ def repository(name)
     repo = name.is_a?(Integer) ? 'yegor256/test' : name
     repo = 'zerocracy/baza' if name == 1439
     repo = 'foo/bazz' if name == 810
+    size =
+      case name
+      when 'yegor256/empty-repo' then 0
+      when 'yegor256/nil-size-repo' then nil
+      else 470
+      end
     {
       id: name_to_number(name),
       full_name: repo,
@@ -414,7 +420,7 @@ def repository(name)
       created_at: random_time,
       updated_at: random_time,
       pushed_at: random_time,
-      size: name == 'yegor256/empty-repo' ? 0 : 470,
+      size:,
       stargazers_count: 1,
       watchers_count: 1,
       language: 'Ruby',
diff --git a/test/fbe/test_octo.rb b/test/fbe/test_octo.rb
index b3b947d..b300f87 100644
--- a/test/fbe/test_octo.rb
+++ b/test/fbe/test_octo.rb
@@ -483,6 +483,18 @@ def test_fetches_fake_not_found_repos
     assert_raises(Octokit::NotFound) { o.repository(404_124) }
   end
 
+  def test_fetches_fake_empty_repo
+    Fbe.octo(loog: Loog::NULL, global: {}, options: Judges::Options.new({ 'testing' => true })).then do |o|
+      assert_equal(0, o.repository('yegor256/empty-repo')[:size])
+    end
+  end
+
+  def test_fetches_fake_nil_size_repo
+    Fbe.octo(loog: Loog::NULL, global: {}, options: Judges::Options.new({ 'testing' => true })).then do |o|
+      assert_nil(o.repository('yegor256/nil-size-repo')[:size])
+    end
+  end
+
   def test_fetches_fake_zerocracy_baza_repo
     o = Fbe.octo(loog: Loog::NULL, global: {}, options: Judges::Options.new({ 'testing' => true }))
     assert_equal('zerocracy/baza', o.repository(1439)[:full_name])