diff --git a/core/tests/unit/ldml/keyboards/k_008_transform_norm-test.xml b/core/tests/unit/ldml/keyboards/k_008_transform_norm-test.xml
index 025fe36a48..c1ff50973b 100644
--- a/core/tests/unit/ldml/keyboards/k_008_transform_norm-test.xml
+++ b/core/tests/unit/ldml/keyboards/k_008_transform_norm-test.xml
@@ -133,4 +133,66 @@
       <check result="YES3" />
     </test>
   </tests>
+  <tests name="regex-tests-4">
+    <test name="regex-test-4a-0">
+      <startContext to="" />
+      <keystroke key="stampy" />
+      <keystroke key="4" />
+      <keystroke key="e" />
+      <keystroke key="u-0320" />
+      <keystroke key="u-0300" />
+      <backspace /> <!-- skip the number, match any -->
+      <check result="YES4" />
+    </test>
+    <test name="regex-test-4a-1">
+      <startContext to="" />
+      <keystroke key="4" />
+      <keystroke key="stampy" />
+      <keystroke key="e" />
+      <keystroke key="u-0320" />
+      <keystroke key="u-0300" />
+      <backspace /> <!-- skip the number, match any -->
+      <check result="YES4" />
+    </test>
+    <test name="regex-test-4a-2">
+      <startContext to="" />
+      <keystroke key="4" />
+      <keystroke key="e" />
+      <keystroke key="stampy" />
+      <keystroke key="u-0320" />
+      <keystroke key="u-0300" />
+      <backspace /> <!-- skip the number, match any -->
+      <check result="YES4" />
+    </test>
+    <test name="regex-test-4a-3">
+      <startContext to="" />
+      <keystroke key="4" />
+      <keystroke key="e" />
+      <keystroke key="u-0320" />
+      <keystroke key="stampy" />
+      <keystroke key="u-0300" />
+      <backspace /> <!-- skip the number, match any -->
+      <check result="YES4" />
+    </test>
+    <test name="regex-test-4a-4">
+      <startContext to="" />
+      <keystroke key="4" />
+      <keystroke key="e" />
+      <keystroke key="u-0320" />
+      <keystroke key="u-0300" />
+      <keystroke key="stampy" />
+      <backspace /> <!-- skip the number, match any -->
+      <check result="YES4" />
+    </test>
+  </tests>
+  <tests name="regex-tests-5">
+    <test name="regex-test-5a-0">
+      <startContext to="" />
+      <keystroke key="5" />
+      <keystroke key="e" />
+      <keystroke key="u-0320" />
+      <keystroke key="u-0300" />
+      <check result="YES4" />
+    </test>
+  </tests>
 </keyboardTest3>
diff --git a/core/tests/unit/ldml/keyboards/k_008_transform_norm.xml b/core/tests/unit/ldml/keyboards/k_008_transform_norm.xml
index 1162a7769e..e47897b858 100644
--- a/core/tests/unit/ldml/keyboards/k_008_transform_norm.xml
+++ b/core/tests/unit/ldml/keyboards/k_008_transform_norm.xml
@@ -15,6 +15,7 @@ from https://github.com/unicode-org/cldr/blob/keyboard-preview/docs/ldml/tr35-ke
     <key id="nfd" output="e\u{0320}\u{0300}" />
     <key id="nfc" output="\u{00E8}\u{0320}" />
     <key id="not-nfd" output="e\u{0300}\u{0320}" />
+    <key id="stampy" output="\m{stampy}" />
   </keys>
 
   <layers formId="us">
@@ -26,7 +27,7 @@ from https://github.com/unicode-org/cldr/blob/keyboard-preview/docs/ldml/tr35-ke
       <row keys="space" />
     </layer>
     <layer modifiers="shift" id="shift">
-      <row keys="u-0300 u-00e8 nfd nfc not-nfd" />
+      <row keys="u-0300 u-00e8 nfd nfc not-nfd stampy" />
     </layer>
   </layers>
 
@@ -43,6 +44,17 @@ from https://github.com/unicode-org/cldr/blob/keyboard-preview/docs/ldml/tr35-ke
       <transform from="1e\u{0300}\u{0320}" to="YES1" /> <!-- out of order but should get normalized -->
       <transform from="2e\u{0320}\u{0300}" to="YES2" /> <!-- in order  NFD -->
       <transform from="3\u{00E8}\u{0320}" to="YES3" /> <!-- in order   NFC -->
+
+      <!-- matches with various markers-->
+      <transform from="4\m{stampy}e\u{0300}\u{0320}" to="YES4a" />
+      <transform from="4e\m{stampy}\u{0300}\u{0320}" to="YES4b" />
+      <transform from="4e\u{0300}\m{stampy}\u{0320}" to="YES4c" />
+      <transform from="4e\u{0300}\u{0320}\m{stampy}" to="YES4d" />
+
+      <transform from="5\m{stampy}e\u{0320}\u{0300}" to="YES5a" />
+      <transform from="5e\m{stampy}\u{0320}\u{0300}" to="YES5b" />
+      <transform from="5e\u{0320}\m{stampy}\u{0300}" to="YES5c" />
+      <transform from="5e\u{0320}\u{0300}\m{stampy}" to="YES5d" />
     </transformGroup>
   </transforms>
 </keyboard3>