diff --git a/src/command_metaschema.cc b/src/command_metaschema.cc
index 9c19f43..fb6c53f 100644
--- a/src/command_metaschema.cc
+++ b/src/command_metaschema.cc
@@ -44,7 +44,7 @@ auto sourcemeta::jsonschema::cli::metaschema(
       cache.insert({dialect.value(), metaschema_template});
     }
 
-    sourcemeta::blaze::ErrorTraceOutput output{metaschema};
+    sourcemeta::blaze::ErrorTraceOutput output{entry.second};
     if (sourcemeta::blaze::evaluate(cache.at(dialect.value()), entry.second,
                                     std::ref(output))) {
       log_verbose(options)
diff --git a/test/metaschema/fail_directory.sh b/test/metaschema/fail_directory.sh
index 599d01a..7aff7e9 100755
--- a/test/metaschema/fail_directory.sh
+++ b/test/metaschema/fail_directory.sh
@@ -29,13 +29,13 @@ test "$CODE" = "1" || exit 1
 cat << EOF > "$TMP/expected.txt"
 fail: $(realpath "$TMP")/schemas/schema_2.json
 error: Schema validation failure
-  The string value "object" was expected to equal one of the following values: "array", "boolean", "integer", "null", "number", "object", and "string"
+  The integer value 1 was expected to equal one of the following values: "array", "boolean", "integer", "null", "number", "object", and "string"
     at instance location "/type"
     at evaluate path "/properties/type/anyOf/0/\$ref/enum"
   The value was expected to consist of an array of at least 1 item
     at instance location "/type"
     at evaluate path "/properties/type/anyOf/1/type"
-  The string value was expected to validate against at least one of the 2 given subschemas
+  The integer value was expected to validate against at least one of the 2 given subschemas
     at instance location "/type"
     at evaluate path "/properties/type/anyOf"
   The object value was expected to validate against the 33 defined properties subschemas
diff --git a/test/metaschema/fail_single.sh b/test/metaschema/fail_single.sh
index 8125c72..f417d08 100755
--- a/test/metaschema/fail_single.sh
+++ b/test/metaschema/fail_single.sh
@@ -20,13 +20,13 @@ test "$CODE" = "1" || exit 1
 cat << EOF > "$TMP/expected.txt"
 fail: $(realpath "$TMP")/schema.json
 error: Schema validation failure
-  The string value "object" was expected to equal one of the following values: "array", "boolean", "integer", "null", "number", "object", and "string"
+  The integer value 1 was expected to equal one of the following values: "array", "boolean", "integer", "null", "number", "object", and "string"
     at instance location "/type"
     at evaluate path "/properties/type/anyOf/0/\$ref/enum"
   The value was expected to consist of an array of at least 1 item
     at instance location "/type"
     at evaluate path "/properties/type/anyOf/1/type"
-  The string value was expected to validate against at least one of the 2 given subschemas
+  The integer value was expected to validate against at least one of the 2 given subschemas
     at instance location "/type"
     at evaluate path "/properties/type/anyOf"
   The object value was expected to validate against the 33 defined properties subschemas
diff --git a/test/metaschema/pass_2020_12.sh b/test/metaschema/pass_2020_12.sh
index b2a93e9..c571eca 100755
--- a/test/metaschema/pass_2020_12.sh
+++ b/test/metaschema/pass_2020_12.sh
@@ -10,7 +10,12 @@ trap clean EXIT
 cat << 'EOF' > "$TMP/schema.json"
 {
   "$schema": "https://json-schema.org/draft/2020-12/schema",
-  "type": "string"
+  "type": "string",
+  "$defs": {
+    "foo": {
+      "type": [ "string", "null" ]
+    }
+  }
 }
 EOF