diff --git a/tests/css_atrule/__snapshots__/jsfmt.spec.js.snap b/tests/css_atrule/__snapshots__/jsfmt.spec.js.snap
index 8230ead98..d0a7faad7 100644
--- a/tests/css_atrule/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/css_atrule/__snapshots__/jsfmt.spec.js.snap
@@ -18,3 +18,44 @@ exports[`if-else.css 1`] = `
 }
 
 `;
+
+exports[`namespaces.css 1`] = `
+@namespace toto "http://toto.example.org";
+@namespace toto url("http://toto.example.org");
+@namespace toto "http://toto.example.org" ;
+@namespace  toto  "http://toto.example.org"  ;
+@namespace
+toto
+"http://toto.example.org"
+;
+@namespace very-very-very-very-very-very-very-very-very-very-very-very-very-very-long-namespace "http://toto.example.org";
+@namespace
+very-very-very-very-very-very-very-very-very-very-very-very-very-very-long-namespace
+"http://toto.example.org"
+;
+@namespace "http://example.com/foo";
+@namespace url("http://example.com/foo");
+@namespace url("http://example.com/foo") ;
+@namespace  url("http://example.com/foo")  ;
+@namespace
+url("http://example.com/foo");
+@namespace url("http://example.com/foo/very/very/very/very/very/very/very/very/very/very/very/very/very/very");
+@namespace
+url("http://example.com/foo/very/very/very/very/very/very/very/very/very/very/very/very/very/very/very");
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+@namespace toto "http://toto.example.org";
+@namespace toto url("http://toto.example.org");
+@namespace toto "http://toto.example.org";
+@namespace toto "http://toto.example.org";
+@namespace toto "http://toto.example.org";
+@namespace very-very-very-very-very-very-very-very-very-very-very-very-very-very-long-namespace "http://toto.example.org";
+@namespace very-very-very-very-very-very-very-very-very-very-very-very-very-very-long-namespace "http://toto.example.org";
+@namespace "http://example.com/foo";
+@namespace url("http://example.com/foo");
+@namespace url("http://example.com/foo");
+@namespace url("http://example.com/foo");
+@namespace url("http://example.com/foo");
+@namespace url("http://example.com/foo/very/very/very/very/very/very/very/very/very/very/very/very/very/very");
+@namespace url("http://example.com/foo/very/very/very/very/very/very/very/very/very/very/very/very/very/very/very");
+
+`;
diff --git a/tests/css_atrule/namespaces.css b/tests/css_atrule/namespaces.css
new file mode 100644
index 000000000..061b1d400
--- /dev/null
+++ b/tests/css_atrule/namespaces.css
@@ -0,0 +1,22 @@
+@namespace toto "http://toto.example.org";
+@namespace toto url("http://toto.example.org");
+@namespace toto "http://toto.example.org" ;
+@namespace  toto  "http://toto.example.org"  ;
+@namespace
+toto
+"http://toto.example.org"
+;
+@namespace very-very-very-very-very-very-very-very-very-very-very-very-very-very-long-namespace "http://toto.example.org";
+@namespace
+very-very-very-very-very-very-very-very-very-very-very-very-very-very-long-namespace
+"http://toto.example.org"
+;
+@namespace "http://example.com/foo";
+@namespace url("http://example.com/foo");
+@namespace url("http://example.com/foo") ;
+@namespace  url("http://example.com/foo")  ;
+@namespace
+url("http://example.com/foo");
+@namespace url("http://example.com/foo/very/very/very/very/very/very/very/very/very/very/very/very/very/very");
+@namespace
+url("http://example.com/foo/very/very/very/very/very/very/very/very/very/very/very/very/very/very/very");