diff --git a/testing/web-platform/meta/css/css-gaps/tentative/parsing/gap-decorations-style-computed.html.ini b/testing/web-platform/meta/css/css-gaps/tentative/parsing/gap-decorations-style-computed.html.ini
new file mode 100644
index 000000000000..e5f7b998e242
--- /dev/null
+++ b/testing/web-platform/meta/css/css-gaps/tentative/parsing/gap-decorations-style-computed.html.ini
@@ -0,0 +1,36 @@
+[gap-decorations-style-computed.html]
+  [Property column-rule-style value 'dotted dashed solid']
+    expected: FAIL
+
+  [Property column-rule-style value 'repeat(10, double)']
+    expected: FAIL
+
+  [Property column-rule-style value 'repeat(3, groove) repeat(4, ridge)']
+    expected: FAIL
+
+  [Property column-rule-style value 'repeat(auto, solid)']
+    expected: FAIL
+
+  [Property column-rule-style value 'repeat(auto, dotted solid inset)']
+    expected: FAIL
+
+  [Property column-rule-style value 'repeat(4, none ridge solid) repeat(auto, hidden)']
+    expected: FAIL
+
+  [Property column-rule-style value 'inset repeat(auto, solid ridge) repeat(4, none groove hidden)']
+    expected: FAIL
+
+  [Property column-rule-style value 'repeat(calc(5 + 3), ridge)']
+    expected: FAIL
+
+  [Property column-rule-style value 'repeat(4, dotted double dashed) repeat(auto, solid) ridge']
+    expected: FAIL
+
+  [Property column-rule-style value 'repeat(4, dotted double dashed) repeat(auto, solid) repeat(4, none groove hidden)']
+    expected: FAIL
+
+  [Property column-rule-style value 'ridge repeat(auto, solid)']
+    expected: FAIL
+
+  [Property column-rule-style value 'ridge repeat(auto, solid) ridge']
+    expected: FAIL
diff --git a/testing/web-platform/meta/css/css-gaps/tentative/parsing/gap-decorations-style-valid.html.ini b/testing/web-platform/meta/css/css-gaps/tentative/parsing/gap-decorations-style-valid.html.ini
new file mode 100644
index 000000000000..8e37aaf14d49
--- /dev/null
+++ b/testing/web-platform/meta/css/css-gaps/tentative/parsing/gap-decorations-style-valid.html.ini
@@ -0,0 +1,42 @@
+[gap-decorations-style-valid.html]
+  [e.style['column-rule-style'\] = "repeat(4, dotted)" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "repeat(3, dashed double dotted)" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "repeat(1, dashed double dotted solid)" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "repeat(4, double)" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "dotted ridge" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "dotted dashed solid groove ridge" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "repeat(3, groove) repeat(4, ridge)" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "inset repeat(3, ridge) none repeat(4, groove hidden dashed)" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "repeat(4, none ridge solid) repeat(5, hidden) double" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "repeat(auto, solid)" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "repeat(auto, dotted solid inset)" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "repeat(auto, dashed groove) ridge" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "repeat(4, dotted double dashed) repeat(auto, solid)" should set the property value]
+    expected: FAIL
+
+  [e.style['column-rule-style'\] = "inset repeat(auto, solid ridge) repeat(4, none groove hidden)" should set the property value]
+    expected: FAIL