diff --git a/css/css-grid/grid-items/grid-item-inline-contribution-001.html b/css/css-grid/grid-items/grid-item-inline-contribution-001.html
new file mode 100644
index 000000000000000..ebed26b3326e94b
--- /dev/null
+++ b/css/css-grid/grid-items/grid-item-inline-contribution-001.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
+<link rel="help" href="https://drafts.csswg.org/css-grid-2/#algo-overview">
+<meta name="assert" content="Tests the min-content contribution is using the correct block-size.">
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="display: inline-grid; background: green; height: 100px; grid-template-rows: 50px;">
+  <div style="height: 100%;"> <!-- This height should resolve against 50px - not 100px -->
+    <canvas width="20" height="10" style="height: 100%;">
+  </div>
+</div>
diff --git a/css/css-grid/grid-items/grid-item-inline-contribution-002.tentative.html b/css/css-grid/grid-items/grid-item-inline-contribution-002.tentative.html
new file mode 100644
index 000000000000000..abf175d81431f9f
--- /dev/null
+++ b/css/css-grid/grid-items/grid-item-inline-contribution-002.tentative.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
+<link rel="help" href="https://drafts.csswg.org/css-grid-2/#algo-overview">
+<meta name="assert" content="Tests the min-content contribution is re-resolved during a 2nd pass.">
+<!--
+
+"
+ Then, if the min-content contribution of any grid item has changed based on
+ the row sizes and alignment calculated in step 2, re-resolve the sizes of the
+ grid columns with the new min-content and max-content contributions (once
+ only).
+"
+
+In this testcase initially the row size is indefinite, then resolves to 100px.
+Using this information we re-resolve the columns, resulting in 100px for the
+first column.
+
+-->
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="display: grid; width: 0; grid-template: auto / auto auto;">
+  <div style="background: green; height: 100%;">
+    <canvas width="10" height="10" style="height: 100%;">
+  </div>
+  <div>
+    <div style="height: 100px;"></div>
+  </div>
+</div>
diff --git a/css/css-grid/grid-items/grid-item-inline-contribution-003.tentative.html b/css/css-grid/grid-items/grid-item-inline-contribution-003.tentative.html
new file mode 100644
index 000000000000000..0488165abe103cb
--- /dev/null
+++ b/css/css-grid/grid-items/grid-item-inline-contribution-003.tentative.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
+<link rel="help" href="https://drafts.csswg.org/css-grid-2/#algo-overview">
+<meta name="assert" content="Tests the min-content contribution is re-resolved during a 2nd pass.">
+<!--
+
+"
+ Then, if the min-content contribution of any grid item has changed based on
+ the row sizes and alignment calculated in step 2, re-resolve the sizes of the
+ grid columns with the new min-content and max-content contributions (once
+ only).
+"
+
+In this testcase initially the row size is indefinite, then resolves to 100px.
+Using this information we re-resolve the columns, resulting in 100px for the
+first column.
+
+-->
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="display: grid; width: 0; grid-template: auto / auto auto;">
+  <div style="background: green;"> <!-- Has stretch alignment which the child should resolve against. -->
+    <canvas width="10" height="10" style="height: 100%;">
+  </div>
+  <div>
+    <div style="height: 100px;"></div>
+  </div>
+</div>
