diff --git a/tests/format/css/parens/__snapshots__/format.test.js.snap b/tests/format/css/parens/__snapshots__/format.test.js.snap
index 4fec4dc4a..32d80c3f6 100644
--- a/tests/format/css/parens/__snapshots__/format.test.js.snap
+++ b/tests/format/css/parens/__snapshots__/format.test.js.snap
@@ -279,16 +279,6 @@ a {
     -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#fad59f, endColorstr=#fa9907)";
 }
 
-.unicode-ranges
-{
-    /* <unicode-range> values */
-    unicode-range: U+26;               /* single codepoint */
-    unicode-range: U+0-7F;
-    unicode-range: U+0025-00FF;        /* codepoint range */
-    unicode-range: U+4??;              /* wildcard range */
-    unicode-range: U+0025-00FF, U+4??; /* multiple values */
-}
-
 =====================================output=====================================
 a {
   prop1: func(1px, 1px, 1px, func(1px, 1px, 1px, func(1px, 1px, 1px)));
@@ -442,14 +432,5 @@ a {
   -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#fad59f, endColorstr=#fa9907)";
 }
 
-.unicode-ranges {
-  /* <unicode-range> values */
-  unicode-range: U+26; /* single codepoint */
-  unicode-range: U+0-7F;
-  unicode-range: U+0025-00FF; /* codepoint range */
-  unicode-range: U+4??; /* wildcard range */
-  unicode-range: U+0025-00FF, U+4??; /* multiple values */
-}
-
 ================================================================================
 `;
diff --git a/tests/format/css/parens/parens.css b/tests/format/css/parens/parens.css
index 25539b1b2..6e4cfef4d 100644
--- a/tests/format/css/parens/parens.css
+++ b/tests/format/css/parens/parens.css
@@ -241,13 +241,3 @@ a {
     filter: progid:DXImageTransform.Microsoft.Shadow(color='#042b47', Direction=45, Strength=6) progid:DXImageTransform.Microsoft.Shadow(color='#042b47', Direction=135, Strength=6);
     -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#fad59f, endColorstr=#fa9907)";
 }
-
-.unicode-ranges
-{
-    /* <unicode-range> values */
-    unicode-range: U+26;               /* single codepoint */
-    unicode-range: U+0-7F;
-    unicode-range: U+0025-00FF;        /* codepoint range */
-    unicode-range: U+4??;              /* wildcard range */
-    unicode-range: U+0025-00FF, U+4??; /* multiple values */
-}
diff --git a/tests/format/css/unicode-ranges/__snapshots__/format.test.js.snap b/tests/format/css/unicode-ranges/__snapshots__/format.test.js.snap
new file mode 100644
index 000000000..e50e87657
--- /dev/null
+++ b/tests/format/css/unicode-ranges/__snapshots__/format.test.js.snap
@@ -0,0 +1,41 @@
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
+
+exports[`unicode-ranges.css format 1`] = `
+====================================options=====================================
+parsers: ["css", "less", "scss"]
+                                                      printWidth: 80 (default) |
+=====================================input======================================
+.unicode-ranges
+{
+    /* <unicode-range> values */
+    unicode-range: U+26;               /* single codepoint */
+    unicode-range: U+0-7F;
+    unicode-range: U+0025-00FF;        /* codepoint range */
+    unicode-range: U+4??;              /* wildcard range */
+    unicode-range: U+0025-00FF, U+4??; /* multiple values */
+}
+
+/* #3646 */
+@font-face {
+  unicode-range: U+0F00, U+F000;
+  unicode-range: U+0f00, U+f000;
+}
+
+=====================================output=====================================
+.unicode-ranges {
+  /* <unicode-range> values */
+  unicode-range: U+26; /* single codepoint */
+  unicode-range: U+0-7F;
+  unicode-range: U+0025-00FF; /* codepoint range */
+  unicode-range: U+4??; /* wildcard range */
+  unicode-range: U+0025-00FF, U+4??; /* multiple values */
+}
+
+/* #3646 */
+@font-face {
+  unicode-range: U+0F00, U+F000;
+  unicode-range: U+0f00, U+f000;
+}
+
+================================================================================
+`;
diff --git a/tests/format/css/unicode-ranges/format.test.js b/tests/format/css/unicode-ranges/format.test.js
new file mode 100644
index 000000000..a3ab9e875
--- /dev/null
+++ b/tests/format/css/unicode-ranges/format.test.js
@@ -0,0 +1 @@
+runFormatTest(import.meta, ["css", "less", "scss"]);
diff --git a/tests/format/css/unicode-ranges/unicode-ranges.css b/tests/format/css/unicode-ranges/unicode-ranges.css
new file mode 100644
index 000000000..504976459
--- /dev/null
+++ b/tests/format/css/unicode-ranges/unicode-ranges.css
@@ -0,0 +1,15 @@
+.unicode-ranges
+{
+    /* <unicode-range> values */
+    unicode-range: U+26;               /* single codepoint */
+    unicode-range: U+0-7F;
+    unicode-range: U+0025-00FF;        /* codepoint range */
+    unicode-range: U+4??;              /* wildcard range */
+    unicode-range: U+0025-00FF, U+4??; /* multiple values */
+}
+
+/* #3646 */
+@font-face {
+  unicode-range: U+0F00, U+F000;
+  unicode-range: U+0f00, U+f000;
+}
diff --git a/tests/format/less/parens/__snapshots__/format.test.js.snap b/tests/format/less/parens/__snapshots__/format.test.js.snap
index 8096d3a2b..9fb714b35 100644
--- a/tests/format/less/parens/__snapshots__/format.test.js.snap
+++ b/tests/format/less/parens/__snapshots__/format.test.js.snap
@@ -290,16 +290,6 @@ a {
     -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#fad59f, endColorstr=#fa9907)";
 }
 
-.unicode-ranges
-{
-    /* <unicode-range> values */
-    unicode-range: U+26;               /* single codepoint */
-    unicode-range: U+0-7F;
-    unicode-range: U+0025-00FF;        /* codepoint range */
-    unicode-range: U+4??;              /* wildcard range */
-    unicode-range: U+0025-00FF, U+4??; /* multiple values */
-}
-
 // no space after unary minus when followed by opening parenthesis, #13998
 .unary_minus_single {
   margin: -(@a);
@@ -478,15 +468,6 @@ a {
   -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#fad59f, endColorstr=#fa9907)";
 }
 
-.unicode-ranges {
-  /* <unicode-range> values */
-  unicode-range: U+26; /* single codepoint */
-  unicode-range: U+0-7F;
-  unicode-range: U+0025-00FF; /* codepoint range */
-  unicode-range: U+4??; /* wildcard range */
-  unicode-range: U+0025-00FF, U+4??; /* multiple values */
-}
-
 // no space after unary minus when followed by opening parenthesis, #13998
 .unary_minus_single {
   margin: -(@a);
diff --git a/tests/format/less/parens/parens.less b/tests/format/less/parens/parens.less
index 155fabc6b..036be6e96 100644
--- a/tests/format/less/parens/parens.less
+++ b/tests/format/less/parens/parens.less
@@ -250,16 +250,6 @@ a {
     -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#fad59f, endColorstr=#fa9907)";
 }
 
-.unicode-ranges
-{
-    /* <unicode-range> values */
-    unicode-range: U+26;               /* single codepoint */
-    unicode-range: U+0-7F;
-    unicode-range: U+0025-00FF;        /* codepoint range */
-    unicode-range: U+4??;              /* wildcard range */
-    unicode-range: U+0025-00FF, U+4??; /* multiple values */
-}
-
 // no space after unary minus when followed by opening parenthesis, #13998
 .unary_minus_single {
   margin: -(@a);
diff --git a/tests/format/scss/parens/__snapshots__/format.test.js.snap b/tests/format/scss/parens/__snapshots__/format.test.js.snap
index d4d062bd2..c7aeb61e1 100644
--- a/tests/format/scss/parens/__snapshots__/format.test.js.snap
+++ b/tests/format/scss/parens/__snapshots__/format.test.js.snap
@@ -349,16 +349,6 @@ a {
     -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#fad59f, endColorstr=#fa9907)";
 }
 
-.unicode-ranges
-{
-    /* <unicode-range> values */
-    unicode-range: U+26;               /* single codepoint */
-    unicode-range: U+0-7F;
-    unicode-range: U+0025-00FF;        /* codepoint range */
-    unicode-range: U+4??;              /* wildcard range */
-    unicode-range: U+0025-00FF, U+4??; /* multiple values */
-}
-
 =====================================output=====================================
 a {
   prop1: func(1px, 1px, 1px, func(1px, 1px, 1px, func(1px, 1px, 1px)));
@@ -555,14 +545,5 @@ a {
   -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#fad59f, endColorstr=#fa9907)";
 }
 
-.unicode-ranges {
-  /* <unicode-range> values */
-  unicode-range: U+26; /* single codepoint */
-  unicode-range: U+0-7F;
-  unicode-range: U+0025-00FF; /* codepoint range */
-  unicode-range: U+4??; /* wildcard range */
-  unicode-range: U+0025-00FF, U+4??; /* multiple values */
-}
-
 ================================================================================
 `;
diff --git a/tests/format/scss/parens/parens.scss b/tests/format/scss/parens/parens.scss
index 2fcb1df9c..c265d2d1c 100644
--- a/tests/format/scss/parens/parens.scss
+++ b/tests/format/scss/parens/parens.scss
@@ -282,13 +282,3 @@ a {
     filter: progid:DXImageTransform.Microsoft.Shadow(color='#042b47', Direction=45, Strength=6) progid:DXImageTransform.Microsoft.Shadow(color='#042b47', Direction=135, Strength=6);
     -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#fad59f, endColorstr=#fa9907)";
 }
-
-.unicode-ranges
-{
-    /* <unicode-range> values */
-    unicode-range: U+26;               /* single codepoint */
-    unicode-range: U+0-7F;
-    unicode-range: U+0025-00FF;        /* codepoint range */
-    unicode-range: U+4??;              /* wildcard range */
-    unicode-range: U+0025-00FF, U+4??; /* multiple values */
-}