diff --git a/test/test-cases/export-class/expected.css b/test/test-cases/export-class/expected.css
index adbce42..2533275 100644
--- a/test/test-cases/export-class/expected.css
+++ b/test/test-cases/export-class/expected.css
@@ -22,6 +22,14 @@
   color: fuchsia;
 }
 
+._input__u-m\00002b {
+  color: maroon;
+}
+
+#_input__u-m\+ {
+  color: navy;
+}
+
 @media (max-width: 520px) {
   /* selector doubled to increase specificity */
   ._input__exportName._input__exportName {
@@ -39,5 +47,6 @@
   ::::: _input__::::;
   1a2b3c: _input__1a2b3c;
   𝌆: _input__𝌆;
+  u-m+: _input__u-m+;
   newExport: _input__newExport;
 }
diff --git a/test/test-cases/export-class/source.css b/test/test-cases/export-class/source.css
index 4cb0a71..3241130 100644
--- a/test/test-cases/export-class/source.css
+++ b/test/test-cases/export-class/source.css
@@ -22,6 +22,14 @@
   color: fuchsia;
 }
 
+:local(.u-m\00002b) {
+  color: maroon;
+}
+
+:local(#u-m\+) {
+  color: navy;
+}
+
 @media (max-width: 520px) {
   /* selector doubled to increase specificity */
   :local(.exportName):local(.exportName) {