diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 0fad27c98d0..c633be9cee2 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -231,7 +231,6 @@ flaky_cpu == linebreak_simple_a.html linebreak_simple_b.html
 # Should be ==?
 != overflow_position_abs_inside_normal_a.html overflow_position_abs_inside_normal_b.html
 == overflow_position_abs_simple_a.html overflow_position_abs_simple_b.html
-== overflow_position_rel_inline_block.html overflow_position_rel_inline_block_ref.html
 == overflow_scroll.html overflow_simple_b.html
 == overflow_simple_a.html overflow_simple_b.html
 resolution=300x300,device-pixel-ratio=2 != pixel_snapping_border_a.html pixel_snapping_border_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 59a867ad441..503d1ba05f9 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -683,6 +683,18 @@
             "url": "/_mozilla/css/flex_nochild.html"
           }
         ],
+        "css/overflow_position_rel_inline_block.html": [
+          {
+            "path": "css/overflow_position_rel_inline_block.html",
+            "references": [
+              [
+                "/_mozilla/css/overflow_position_rel_inline_block_ref.html",
+                "=="
+              ]
+            ],
+            "url": "/_mozilla/css/overflow_position_rel_inline_block.html"
+          }
+        ],
         "css/overflow_wrap_a.html": [
           {
             "path": "css/overflow_wrap_a.html",
@@ -3360,6 +3372,18 @@
           "url": "/_mozilla/css/flex_nochild.html"
         }
       ],
+      "css/overflow_position_rel_inline_block.html": [
+        {
+          "path": "css/overflow_position_rel_inline_block.html",
+          "references": [
+            [
+              "/_mozilla/css/overflow_position_rel_inline_block_ref.html",
+              "=="
+            ]
+          ],
+          "url": "/_mozilla/css/overflow_position_rel_inline_block.html"
+        }
+      ],
       "css/overflow_wrap_a.html": [
         {
           "path": "css/overflow_wrap_a.html",
diff --git a/tests/ref/overflow_position_rel_inline_block.html b/tests/wpt/mozilla/tests/css/overflow_position_rel_inline_block.html
similarity index 70%
rename from tests/ref/overflow_position_rel_inline_block.html
rename to tests/wpt/mozilla/tests/css/overflow_position_rel_inline_block.html
index 6aea81b8abe..116e448550c 100644
--- a/tests/ref/overflow_position_rel_inline_block.html
+++ b/tests/wpt/mozilla/tests/css/overflow_position_rel_inline_block.html
@@ -1,3 +1,4 @@
+<link rel='match' href='overflow_position_rel_inline_block_ref.html'>
 <style>
   div {
     overflow:hidden;
diff --git a/tests/ref/overflow_position_rel_inline_block_ref.html b/tests/wpt/mozilla/tests/css/overflow_position_rel_inline_block_ref.html
similarity index 100%
rename from tests/ref/overflow_position_rel_inline_block_ref.html
rename to tests/wpt/mozilla/tests/css/overflow_position_rel_inline_block_ref.html