--- a/layout/reftests/ib-split/reftest.list
+++ b/layout/reftests/ib-split/reftest.list
@@ -1,20 +1,8 @@
-== remove-split-inline-1.html remove-split-inline-1-ref.html
-== remove-from-split-inline-1.html remove-from-split-inline-1-ref.html
-== remove-from-split-inline-1-ref.html remove-from-split-inline-1-noib-ref.html
-== remove-from-split-inline-2.html remove-from-split-inline-2-ref.html
-== remove-from-split-inline-3.html remove-from-split-inline-3-ref.html
-== remove-from-split-inline-3-ref.html remove-from-split-inline-3-noib-ref.html
-== remove-from-split-inline-4.html remove-from-split-inline-4-ref.html
-== remove-from-split-inline-4-ref.html remove-from-split-inline-4-noib-ref.html
-== remove-from-split-inline-5.html remove-from-split-inline-5-ref.html
-== remove-from-split-inline-5-ref.html remove-from-split-inline-5-noib-ref.html
-== remove-from-split-inline-6.html remove-from-split-inline-6-ref.html
-== remove-from-split-inline-6-ref.html remove-from-split-inline-6-noib-ref.html
 == insert-into-split-inline-1a.html insert-into-split-inline-1-ref.html
 == insert-into-split-inline-1b.html insert-into-split-inline-1-ref.html
 == insert-into-split-inline-1c.html insert-into-split-inline-1-ref.html
 == insert-into-split-inline-1d.html insert-into-split-inline-1-ref.html
 == insert-into-split-inline-1e.html insert-into-split-inline-1-ref.html
 == insert-into-split-inline-1f.html insert-into-split-inline-1-ref.html
 == insert-into-split-inline-1g.html insert-into-split-inline-1-ref.html
 == insert-into-split-inline-1h.html insert-into-split-inline-1-ref.html

--- a/layout/reftests/moz.build
+++ b/layout/reftests/moz.build
@@ -284,16 +284,18 @@ with Files('w3c-css/received/css-values/
 with Files('w3c-css/submitted/conditional3/**'):
     BUG_COMPONENT = ('Core', 'CSS Parsing and Computation')
 with Files('w3c-css/submitted/css21/**'):
     BUG_COMPONENT = ('Core', 'Layout')
 with Files('w3c-css/submitted/flexbox/**'):
     BUG_COMPONENT = ('Core', 'Layout')
 with Files('w3c-css/submitted/fonts3/**'):
     BUG_COMPONENT = ('Core', 'Layout: Text')
+with Files('w3c-css/submitted/ib-split/**'):
+    BUG_COMPONENT = ('Core', 'Layout: Block and Inline')
 with Files('w3c-css/submitted/images3/**'):
     BUG_COMPONENT = ('Core', 'Layout')
 with Files('w3c-css/submitted/lists-3/**'):
     BUG_COMPONENT = ('Core', 'Layout: Block and Inline')
 with Files('w3c-css/submitted/multicol3/**'):
     BUG_COMPONENT = ('Core', 'Layout')
 with Files('w3c-css/submitted/ruby/**'):
     BUG_COMPONENT = ('Core', 'Layout: Block and Inline')

new file mode 100644
--- /dev/null
+++ b/layout/reftests/w3c-css/submitted/ib-split/reftest.list
@@ -0,0 +1,12 @@
+== remove-split-inline-1.html remove-split-inline-1-ref.html
+== remove-from-split-inline-1.html remove-from-split-inline-1-ref.html
+== remove-from-split-inline-1-ref.html remove-from-split-inline-1-noib-ref.html
+== remove-from-split-inline-2.html remove-from-split-inline-2-ref.html
+== remove-from-split-inline-3.html remove-from-split-inline-3-ref.html
+== remove-from-split-inline-3-ref.html remove-from-split-inline-3-noib-ref.html
+== remove-from-split-inline-4.html remove-from-split-inline-4-ref.html
+== remove-from-split-inline-4-ref.html remove-from-split-inline-4-noib-ref.html
+== remove-from-split-inline-5.html remove-from-split-inline-5-ref.html
+== remove-from-split-inline-5-ref.html remove-from-split-inline-5-noib-ref.html
+== remove-from-split-inline-6.html remove-from-split-inline-6-ref.html
+== remove-from-split-inline-6-ref.html remove-from-split-inline-6-noib-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-1-noib-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-1-noib-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-1-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-1-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-1.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-1.html

rename from layout/reftests/ib-split/remove-from-split-inline-2-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-2-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-2.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-2.html

rename from layout/reftests/ib-split/remove-from-split-inline-3-noib-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-3-noib-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-3-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-3-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-3.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-3.html

rename from layout/reftests/ib-split/remove-from-split-inline-4-noib-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-4-noib-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-4-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-4-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-4.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-4.html

rename from layout/reftests/ib-split/remove-from-split-inline-5-noib-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-5-noib-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-5-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-5-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-5.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-5.html

rename from layout/reftests/ib-split/remove-from-split-inline-6-noib-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-6-noib-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-6-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-6-ref.html

rename from layout/reftests/ib-split/remove-from-split-inline-6.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-from-split-inline-6.html

rename from layout/reftests/ib-split/remove-split-inline-1-ref.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-split-inline-1-ref.html

rename from layout/reftests/ib-split/remove-split-inline-1.html
rename to layout/reftests/w3c-css/submitted/ib-split/remove-split-inline-1.html

--- a/layout/reftests/w3c-css/submitted/reftest.list
+++ b/layout/reftests/w3c-css/submitted/reftest.list
@@ -35,16 +35,19 @@ include counter-styles-3/reftest.list
 include filters/reftest.list
 
 # Flexible Box Layout Module
 include flexbox/reftest.list
 
 # Fonts Level 3
 include fonts3/reftest.list
 
+# block-inside-inline splits
+include ib-split/reftest.list
+
 # Image Values and Replaced Content Level 3
 include images3/reftest.list
 
 # Lists and Counters Level 3
 include lists-3/reftest.list
 
 # Masking Level 1
 include masking/reftest.list