diff --git a/rhodecode/tests/lib/test_diffs.py b/rhodecode/tests/lib/test_diffs.py
--- a/rhodecode/tests/lib/test_diffs.py
+++ b/rhodecode/tests/lib/test_diffs.py
@@ -86,8 +86,10 @@ def test_diffprocessor_as_html_with_comm
         </tr>
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             <td class="add-comment-line"><span class="add-comment-content"><a href="#"><span class="icon-comment-add"></span></a></span></td>
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-            <td id="setuppy_n2" class="lineno new"><a href="#setuppy_n2">2</a></td>
+            <td id="setuppy_o2" class="lineno old"><a href="#setuppy_o2" class="tooltip"
+                        title="Click to select line">2</a></td>
+            <td id="setuppy_n2" class="lineno new"><a href="#setuppy_n2" class="tooltip"
+                        title="Click to select line">2</a></td>
             <td class="code">
                 <pre>#!/usr/bin/python
         </pre>
@@ -95,8 +97,10 @@ def test_diffprocessor_as_html_with_comm
         </tr>
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             <td class="add-comment-line"><span class="add-comment-content"><a href="#"><span class="icon-comment-add"></span></a></span></td>
-            <td id="setuppy_o3" class="lineno old"><a href="#setuppy_o3">3</a></td>
-            <td id="setuppy_n3" class="lineno new"><a href="#setuppy_n3">3</a></td>
+            <td id="setuppy_o3" class="lineno old"><a href="#setuppy_o3" class="tooltip"
+                        title="Click to select line">3</a></td>
+            <td id="setuppy_n3" class="lineno new"><a href="#setuppy_n3" class="tooltip"
+                        title="Click to select line">3</a></td>
             <td class="code">
                 <pre># Setup file for X
         </pre>
@@ -104,8 +108,10 @@ def test_diffprocessor_as_html_with_comm
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             <td class="add-comment-line"><span class="add-comment-content"><a href="#"><span class="icon-comment-add"></span></a></span></td>
-            <td id="setuppy_o4" class="lineno old"><a href="#setuppy_o4">4</a></td>
-            <td id="setuppy_n4" class="lineno new"><a href="#setuppy_n4">4</a></td>
+            <td id="setuppy_o4" class="lineno old"><a href="#setuppy_o4" class="tooltip"
+                        title="Click to select line">4</a></td>
+            <td id="setuppy_n4" class="lineno new"><a href="#setuppy_n4" class="tooltip"
+                        title="Click to select line">4</a></td>
             <td class="code">
                 <pre># Copyright (C) No one
         </pre>
@@ -113,8 +119,10 @@ def test_diffprocessor_as_html_with_comm
         </tr>
         <tr class="line del">
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-            <td id="setuppy_o5" class="lineno old"><a href="#setuppy_o5">5</a></td>
-            <td  class="lineno new"><a href="#setuppy_n"></a></td>
+            <td id="setuppy_o5" class="lineno old"><a href="#setuppy_o5" class="tooltip"
+                        title="Click to select line">5</a></td>
+            <td  class="lineno new"><a href="#setuppy_n" class="tooltip"
+                        title="Click to select line"></a></td>
             <td class="code">
                 <pre>
         </pre>
@@ -122,8 +130,10 @@ def test_diffprocessor_as_html_with_comm
         </tr>
         <tr class="line add">
             <td class="add-comment-line"><span class="add-comment-content"><a href="#"><span class="icon-comment-add"></span></a></span></td>
-            <td  class="lineno old"><a href="#setuppy_o"></a></td>
-            <td id="setuppy_n5" class="lineno new"><a href="#setuppy_n5">5</a></td>
+            <td  class="lineno old"><a href="#setuppy_o" class="tooltip"
+                        title="Click to select line"></a></td>
+            <td id="setuppy_n5" class="lineno new"><a href="#setuppy_n5" class="tooltip"
+                        title="Click to select line">5</a></td>
             <td class="code">
                 <pre><ins>x</ins>
         </pre>
@@ -131,8 +141,10 @@ def test_diffprocessor_as_html_with_comm
         </tr>
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             <td class="add-comment-line"><span class="add-comment-content"><a href="#"><span class="icon-comment-add"></span></a></span></td>
-            <td id="setuppy_o6" class="lineno old"><a href="#setuppy_o6">6</a></td>
-            <td id="setuppy_n6" class="lineno new"><a href="#setuppy_n6">6</a></td>
+            <td id="setuppy_o6" class="lineno old"><a href="#setuppy_o6" class="tooltip"
+                        title="Click to select line">6</a></td>
+            <td id="setuppy_n6" class="lineno new"><a href="#setuppy_n6" class="tooltip"
+                        title="Click to select line">6</a></td>
             <td class="code">
                 <pre>try:
         </pre>
@@ -140,8 +152,10 @@ def test_diffprocessor_as_html_with_comm
         </tr>
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             <td class="add-comment-line"><span class="add-comment-content"><a href="#"><span class="icon-comment-add"></span></a></span></td>
-            <td id="setuppy_o7" class="lineno old"><a href="#setuppy_o7">7</a></td>
-            <td id="setuppy_n7" class="lineno new"><a href="#setuppy_n7">7</a></td>
+            <td id="setuppy_o7" class="lineno old"><a href="#setuppy_o7" class="tooltip"
+                        title="Click to select line">7</a></td>
+            <td id="setuppy_n7" class="lineno new"><a href="#setuppy_n7" class="tooltip"
+                        title="Click to select line">7</a></td>
             <td class="code">
                 <pre>    from setuptools import setup, Extension
         </pre>
@@ -149,8 +163,10 @@ def test_diffprocessor_as_html_with_comm
         </tr>
         <tr class="line unmod">
             <td class="add-comment-line"><span class="add-comment-content"><a href="#"><span class="icon-comment-add"></span></a></span></td>
-            <td id="setuppy_o8" class="lineno old"><a href="#setuppy_o8">8</a></td>
-            <td id="setuppy_n8" class="lineno new"><a href="#setuppy_n8">8</a></td>
+            <td id="setuppy_o8" class="lineno old"><a href="#setuppy_o8" class="tooltip"
+                        title="Click to select line">8</a></td>
+            <td id="setuppy_n8" class="lineno new"><a href="#setuppy_n8" class="tooltip"
+                        title="Click to select line">8</a></td>
             <td class="code">
                 <pre>except ImportError:
         </pre>