diff --git a/encoding/jsonschema/testdata/num.txtar b/encoding/jsonschema/testdata/num.txtar
index 2dad4a44042..ed5dbd03943 100644
--- a/encoding/jsonschema/testdata/num.txtar
+++ b/encoding/jsonschema/testdata/num.txtar
@@ -37,7 +37,6 @@
   },
   "additionalProperties": false
 }
-
 -- out/decode/cue --
 import (
 	"strings"
diff --git a/encoding/jsonschema/testdata/numericenum.txtar b/encoding/jsonschema/testdata/numericenum.txtar
new file mode 100644
index 00000000000..043826338eb
--- /dev/null
+++ b/encoding/jsonschema/testdata/numericenum.txtar
@@ -0,0 +1,13 @@
+# Test that we can use a "number" type constraint with a numeric enum.
+# See issue #3173.
+
+# TODO fix this so it works.
+
+-- type.json --
+{
+    "type": "number",
+    "enum": [ 1, 2, 3]
+}
+-- out/decode/err --
+constraint not allowed because type number is excluded:
+    type.json:2:5