diff --git a/css/css-text/white-space/reference/white-space-intrinsic-size-001-ref.html b/css/css-text/white-space/reference/white-space-intrinsic-size-001-ref.html
index 1f1761d5a3de94..cf59a70890adb3 100644
--- a/css/css-text/white-space/reference/white-space-intrinsic-size-001-ref.html
+++ b/css/css-text/white-space/reference/white-space-intrinsic-size-001-ref.html
@@ -4,7 +4,7 @@
 <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
 <style>
 div {
-  font-family: monospace;
+  font-family: Ahem;
   color: transparent;
   font-size: 50px;
   background: green;
diff --git a/css/css-text/white-space/reference/white-space-intrinsic-size-002-ref.html b/css/css-text/white-space/reference/white-space-intrinsic-size-002-ref.html
index a97a089153d952..78ee28b61fd2a6 100644
--- a/css/css-text/white-space/reference/white-space-intrinsic-size-002-ref.html
+++ b/css/css-text/white-space/reference/white-space-intrinsic-size-002-ref.html
@@ -6,7 +6,7 @@
 div {
   color: transparent;
   background: blue;
-  font-family: monospace;
+  font-family: Ahem;
   font-size: 50px;
   width: 3ch;
 }
diff --git a/css/css-text/white-space/reference/white-space-intrinsic-size-003-ref.html b/css/css-text/white-space/reference/white-space-intrinsic-size-003-ref.html
index 2ead6c8c7ae74a..1d9ac7abc4ac49 100644
--- a/css/css-text/white-space/reference/white-space-intrinsic-size-003-ref.html
+++ b/css/css-text/white-space/reference/white-space-intrinsic-size-003-ref.html
@@ -4,6 +4,7 @@
 <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
 <style>
 div {
+  font-family: Ahem;
   color: transparent;
   font-size: 50px;
   background: green;
diff --git a/css/css-text/white-space/reference/white-space-intrinsic-size-004-ref.html b/css/css-text/white-space/reference/white-space-intrinsic-size-004-ref.html
index 6b2d4b49d53a0e..34757067b15b6a 100644
--- a/css/css-text/white-space/reference/white-space-intrinsic-size-004-ref.html
+++ b/css/css-text/white-space/reference/white-space-intrinsic-size-004-ref.html
@@ -9,7 +9,7 @@
 }
 div {
   color: transparent;
-  font-family: monospace;
+  font-family: Ahem;
   font-size: 50px;
   width: 5ch;
 }
diff --git a/css/css-text/white-space/white-space-intrinsic-size-001.html b/css/css-text/white-space/white-space-intrinsic-size-001.html
index 22514ed669f043..9974041c80ae66 100644
--- a/css/css-text/white-space/white-space-intrinsic-size-001.html
+++ b/css/css-text/white-space/white-space-intrinsic-size-001.html
@@ -15,7 +15,7 @@
 }
 aside:last-of-type { overflow-wrap: break-word; }
 div {
-  font-family: monospace;
+  font-family: Ahem;
   color: transparent;
   font-size: 50px;
   width: 0ch;
diff --git a/css/css-text/white-space/white-space-intrinsic-size-002.html b/css/css-text/white-space/white-space-intrinsic-size-002.html
index ce222d89879881..d105756d0baa7e 100644
--- a/css/css-text/white-space/white-space-intrinsic-size-002.html
+++ b/css/css-text/white-space/white-space-intrinsic-size-002.html
@@ -19,7 +19,7 @@
 }
 div {
   color: transparent;
-  font-family: monospace;
+  font-family: Ahem;
   font-size: 50px;
   width: 3ch;
   /* both floats should take the full 3ch,
diff --git a/css/css-text/white-space/white-space-intrinsic-size-003.html b/css/css-text/white-space/white-space-intrinsic-size-003.html
index 50c1d1aca6d50f..fca1ec39ed07bf 100644
--- a/css/css-text/white-space/white-space-intrinsic-size-003.html
+++ b/css/css-text/white-space/white-space-intrinsic-size-003.html
@@ -15,6 +15,7 @@
 }
 div {
   color: transparent;
+  font-family: Ahem;
   font-size: 50px;
   width: 0ch;
 }
diff --git a/css/css-text/white-space/white-space-intrinsic-size-004.html b/css/css-text/white-space/white-space-intrinsic-size-004.html
index 21c0bd66cb5441..510a5c5d14188e 100644
--- a/css/css-text/white-space/white-space-intrinsic-size-004.html
+++ b/css/css-text/white-space/white-space-intrinsic-size-004.html
@@ -17,7 +17,7 @@
 aside:last-of-type { overflow-wrap: break-word; }
 div {
   color: transparent;
-  font-family: monospace;
+  font-family: Ahem;
   font-size: 50px;
   width: 3ch; /* enough room for both floats if their max-content size does not include the preserved spaces,
 		 but not enough if they do, causing a line break in that case. */