diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24ad3ec..487409a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 - Array schema generator now takes additional optional parameters `min` and `max` which a sugar for value length assertions. 
 - Added schema generator for argument sinks. Takes `positional` and `named` as optional parameters that take schema types. Absence of one of these parameters indicate that these must also be absent from the argument type being validated.
 - **(Potentially Breaking)** Content now accepts `symbol` as a valid input type by default (see #20)
+- **(Potentially Breaking)** If the tested value is `auto`, parsing no longer fails. If `default` is set, it takes the default value. If `optional` is set but not `default`, value is parsed as `none`.
 
 ---
 
diff --git a/src/base-type.typ b/src/base-type.typ
index 7eea03b..02bfa72 100644
--- a/src/base-type.typ
+++ b/src/base-type.typ
@@ -79,7 +79,7 @@
     validate: (self, it, scope: (), ctx: z-ctx()) => {
 
       //it = self.default
-      if (it == none or type(it) == none) {
+      if (it == none or it == auto) {
         it = self.default
       }
       it = (self.pre-transform)(self, it)
diff --git a/tests/types/string/ref/1.png b/tests/types/string/ref/1.png
index ee98b62..1c54446 100644
Binary files a/tests/types/string/ref/1.png and b/tests/types/string/ref/1.png differ
diff --git a/tests/types/string/test.typ b/tests/types/string/test.typ
index 7840d94..7774c0d 100644
--- a/tests/types/string/test.typ
+++ b/tests/types/string/test.typ
@@ -47,4 +47,9 @@
 #z.parse("192.168.0.1", z.ip())
 
 == default
-#z.parse(none, z.string(default: "Hello"))
\ No newline at end of file
+#let _ = z.parse(none, z.string(default: "Hello")) 
+#let _ = z.parse(auto, z.string(default: "Hello"))
+#let _ = z.parse(auto, z.string(default: "Hello", optional: true))
+#let _ = repr(z.parse(auto, z.string(optional: true)))
+// #z.parse(auto, z.string()) \ 
+#let _ = z.parse("none", z.string(default: "Hello"))
\ No newline at end of file