diff --git a/src/__celerity_resource_map__.php b/src/__celerity_resource_map__.php
index 3f4d388029..640c179500 100644
--- a/src/__celerity_resource_map__.php
+++ b/src/__celerity_resource_map__.php
@@ -987,6 +987,18 @@ celerity_register_resource_map(array(
     ),
     'disk' => '/rsrc/js/application/differential/behavior-show-all-comments.js',
   ),
+  'javelin-behavior-differential-show-field-details' =>
+  array(
+    'uri' => '/res/1dfd4d10/rsrc/js/application/differential/behavior-show-field-details.js',
+    'type' => 'js',
+    'requires' =>
+    array(
+      0 => 'javelin-behavior',
+      1 => 'javelin-stratcom',
+      2 => 'javelin-dom',
+    ),
+    'disk' => '/rsrc/js/application/differential/behavior-show-field-details.js',
+  ),
   'javelin-behavior-differential-show-more' =>
   array(
     'uri' => '/res/e92c5272/rsrc/js/application/differential/behavior-show-more.js',
diff --git a/src/applications/differential/field/specification/lint/DifferentialLintFieldSpecification.php b/src/applications/differential/field/specification/lint/DifferentialLintFieldSpecification.php
index 872fa645ee..f6adf8fa9f 100644
--- a/src/applications/differential/field/specification/lint/DifferentialLintFieldSpecification.php
+++ b/src/applications/differential/field/specification/lint/DifferentialLintFieldSpecification.php
@@ -52,6 +52,8 @@ final class DifferentialLintFieldSpecification
     $lmsg = DifferentialRevisionUpdateHistoryView::getDiffLintMessage($diff);
     $ldata = $this->getDiffProperty('arc:lint');
     $ltail = null;
+    $have_details = false;
+
     if ($ldata) {
       $ldata = igroup($ldata, 'path');
       $lint_messages = array();
@@ -78,11 +80,20 @@ final class DifferentialLintFieldSpecification
               ),
               $line_link);
           }
+          if ($description != '') {
+            $have_details = true;
+          }
           $message_markup[] = hsprintf(
             '<li>'.
               '<span class="lint-severity-%s">%s</span> (%s) %s '.
               'at line '.$line_link.
-              '<p>%s</p>'.
+              javelin_render_tag(
+                'div',
+                array(
+                  'sigil' => 'differential-field-detail',
+                  'style' => 'display: none;',
+                ),
+                '%s').
             '</li>',
             $severity,
             ucwords($severity),
@@ -106,6 +117,17 @@ final class DifferentialLintFieldSpecification
         '</div>';
     }
 
+    Javelin::initBehavior('differential-show-field-details');
+    if ($have_details) {
+      $lmsg .= ' - '.javelin_render_tag(
+        'a',
+        array(
+          'href' => '#details',
+          'sigil' => 'differential-show-field-details',
+        ),
+        'Details');
+    }
+
     return $lstar.' '.$lmsg.$ltail;
   }
 }
diff --git a/src/applications/differential/field/specification/lint/__init__.php b/src/applications/differential/field/specification/lint/__init__.php
index 0041dfe5f7..e6a63dd8d7 100644
--- a/src/applications/differential/field/specification/lint/__init__.php
+++ b/src/applications/differential/field/specification/lint/__init__.php
@@ -8,6 +8,8 @@
 
 phutil_require_module('phabricator', 'applications/differential/field/specification/base');
 phutil_require_module('phabricator', 'applications/differential/view/revisionupdatehistory');
+phutil_require_module('phabricator', 'infrastructure/javelin/api');
+phutil_require_module('phabricator', 'infrastructure/javelin/markup');
 
 phutil_require_module('phutil', 'markup');
 phutil_require_module('phutil', 'utils');
diff --git a/src/applications/differential/field/specification/unit/DifferentialUnitFieldSpecification.php b/src/applications/differential/field/specification/unit/DifferentialUnitFieldSpecification.php
index 6a8e365e68..133e58f96a 100644
--- a/src/applications/differential/field/specification/unit/DifferentialUnitFieldSpecification.php
+++ b/src/applications/differential/field/specification/unit/DifferentialUnitFieldSpecification.php
@@ -53,6 +53,7 @@ final class DifferentialUnitFieldSpecification
     $postponed_count = 0;
     $udata = $this->getDiffProperty('arc:unit');
     $utail = null;
+    $have_details = false;
 
     if ($udata) {
       $unit_messages = array();
@@ -66,6 +67,10 @@ final class DifferentialUnitFieldSpecification
           $userdata = phutil_utf8_shorten(idx($test, 'userdata'), 512);
           $userdata = $engine->markupText($userdata);
 
+          if ($userdata != '') {
+            $have_details = true;
+          }
+
           $unit_messages[] =
             '<li>'.
               '<span class="unit-result-'.phutil_escape_html($result).'">'.
@@ -73,7 +78,13 @@ final class DifferentialUnitFieldSpecification
               '</span>'.
               ' '.
               phutil_escape_html($name).
-              '<p>'.$userdata.'</p>'.
+              javelin_render_tag(
+                'div',
+                array(
+                  'sigil' => 'differential-field-detail',
+                  'style' => 'display: none;',
+                ),
+                $userdata).
             '</li>';
 
         } else if ($result == DifferentialUnitTestResult::RESULT_POSTPONED) {
@@ -98,6 +109,17 @@ final class DifferentialUnitFieldSpecification
       $umsg = $postponed_count.' '.$umsg;
     }
 
+    Javelin::initBehavior('differential-show-field-details');
+    if ($have_details) {
+      $umsg .= ' - '.javelin_render_tag(
+        'a',
+        array(
+          'href' => '#details',
+          'sigil' => 'differential-show-field-details',
+        ),
+        'Details');
+    }
+
     return $ustar.' '.$umsg.$utail;
   }
 
diff --git a/src/applications/differential/field/specification/unit/__init__.php b/src/applications/differential/field/specification/unit/__init__.php
index 9c7b32e314..ad46eae787 100644
--- a/src/applications/differential/field/specification/unit/__init__.php
+++ b/src/applications/differential/field/specification/unit/__init__.php
@@ -11,6 +11,8 @@ phutil_require_module('phabricator', 'applications/differential/constants/unitte
 phutil_require_module('phabricator', 'applications/differential/field/specification/base');
 phutil_require_module('phabricator', 'applications/differential/view/revisionupdatehistory');
 phutil_require_module('phabricator', 'applications/markup/engine');
+phutil_require_module('phabricator', 'infrastructure/javelin/api');
+phutil_require_module('phabricator', 'infrastructure/javelin/markup');
 
 phutil_require_module('phutil', 'markup');
 phutil_require_module('phutil', 'utils');
diff --git a/webroot/rsrc/js/application/differential/behavior-show-field-details.js b/webroot/rsrc/js/application/differential/behavior-show-field-details.js
new file mode 100644
index 0000000000..af1abb26f8
--- /dev/null
+++ b/webroot/rsrc/js/application/differential/behavior-show-field-details.js
@@ -0,0 +1,31 @@
+/**
+ * @provides javelin-behavior-differential-show-field-details
+ * @requires javelin-behavior
+ *           javelin-stratcom
+ *           javelin-dom
+ */
+
+JX.behavior('differential-show-field-details', function() {
+
+  JX.Stratcom.listen(
+    'click',
+    'differential-show-field-details',
+    function(e) {
+      var node = e.getNode('tag:td');
+      var data = JX.Stratcom.getData(node);
+      var details = JX.DOM.scry(
+        node,
+        'div',
+        'differential-field-detail');
+      for (var i=0; i < details.length; i++) {
+        if (!data.detailsShown) {
+          JX.DOM.show(details[i]);
+        } else {
+          JX.DOM.hide(details[i]);
+        }
+      }
+      data.detailsShown = !data.detailsShown;
+      e.kill();
+    });
+
+});