diff --git a/Tests/LibWeb/Layout/expected/block-and-inline/percentage-min-width-with-max-content-containing-block-width.txt b/Tests/LibWeb/Layout/expected/block-and-inline/percentage-min-width-with-max-content-containing-block-width.txt
new file mode 100644
index 0000000000..054c492536
--- /dev/null
+++ b/Tests/LibWeb/Layout/expected/block-and-inline/percentage-min-width-with-max-content-containing-block-width.txt
@@ -0,0 +1,8 @@
+Viewport <#document> at (0,0) content-size 800x600 children: not-inline
+ BlockContainer at (0,0) content-size 800x33.46875 [BFC] children: not-inline
+ BlockContainer
at (8,8) content-size 200x17.46875 children: not-inline
+ BlockContainer at (8,8) content-size 200x17.46875 children: inline
+ line 0 width: 36.84375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
+ frag 0 from TextNode start: 0, length: 5, rect: [8,8 36.84375x17.46875]
+ "hello"
+ TextNode <#text>
diff --git a/Tests/LibWeb/Layout/input/block-and-inline/percentage-min-width-with-max-content-containing-block-width.html b/Tests/LibWeb/Layout/input/block-and-inline/percentage-min-width-with-max-content-containing-block-width.html
new file mode 100644
index 0000000000..4756851358
--- /dev/null
+++ b/Tests/LibWeb/Layout/input/block-and-inline/percentage-min-width-with-max-content-containing-block-width.html
@@ -0,0 +1,9 @@
+
hello
diff --git a/Userland/Libraries/LibWeb/Layout/FormattingContext.cpp b/Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
index 10499dc82f..9a1b8b277f 100644
--- a/Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
+++ b/Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
@@ -1372,7 +1372,7 @@ CSSPixels FormattingContext::calculate_max_content_height(Layout::Box const& box
CSS::Length FormattingContext::calculate_inner_width(Layout::Box const& box, AvailableSize const& available_width, CSS::Size const& width) const
{
- auto width_of_containing_block = available_width.to_px();
+ auto width_of_containing_block = available_width.to_px_or_zero();
auto width_of_containing_block_as_length_for_resolve = CSS::Length::make_px(width_of_containing_block);
if (width.is_auto()) {
return width.resolved(box, width_of_containing_block_as_length_for_resolve);