diff --git a/packages/cordis/tool-cordis/tests/mount.spec.ts b/packages/cordis/tool-cordis/tests/mount.spec.ts
index 86b0084484..58a403bef6 100644
--- a/packages/cordis/tool-cordis/tests/mount.spec.ts
+++ b/packages/cordis/tool-cordis/tests/mount.spec.ts
@@ -384,6 +384,8 @@ describe('cordis_mount', () => {
     ['parameters: { type: \'object\', properties: {}, additionalProperties: false }', 'parameters.additionalProperties must be true or omitted'],
     ['parameters: { type: \'object\', properties: {}, required: \'text\' }', 'parameters.required must be an array of declared property names'],
     ['parameters: { type: \'object\', properties: {}, required: undefined }', 'parameters.required must be an array of declared property names'],
+    ['parameters: { type: \'object\', properties: {}, required: [42] }', 'parameters.required must be an array of declared property names'],
+    ['parameters: (() => { const required = []; required.length = 1; return { type: \'object\', properties: {}, required } })()', 'parameters.required must be an array of declared property names'],
     ['parameters: (() => { class Names extends Array { *[Symbol.iterator]() {} }; const required = new Names(); required[0] = \'text\'; required.length = 1; return { type: \'object\', properties: { text: { type: \'string\' } }, required } })()', 'parameters.required must be an array of declared property names'],
     ['parameters: { type: \'object\', properties: {}, required: [\'text\'] }', 'parameters.required names undeclared property "text"'],
     ['parameters: { type: \'object\', properties: { text: { type: \'string\', required: true } } }', 'parameters.text.required belongs to the containing raw object schema'],
@@ -395,6 +397,7 @@ describe('cordis_mount', () => {
     ['parameters: { type: \'object\', properties: { cfg: { type: \'object\', required: undefined } } }', 'parameters.cfg.required must be an array of declared property names'],
     ['parameters: { value: { oneOf: \'bad\' } }', 'parameters.value.oneOf must contain at least two schemas'],
     ['parameters: { value: { oneOf: new (class Branches extends Array {})({ type: \'string\' }, { type: \'null\' }) } }', 'parameters.value.oneOf must contain at least two schemas'],
+    ['parameters: { value: { oneOf: Object.assign([{ type: \'string\' }, { type: \'null\' }], { extra: true }) } }', 'parameters.value.oneOf must contain at least two schemas'],
     ['parameters: { value: { type: \'string\', enum: \'bad\' } }', 'enum must be a non-empty array'],
     ['parameters: { value: { type: \'string\', enum: new (class Values extends Array {})(\'a\', \'b\') } }', 'parameters.value.enum must be a non-empty array'],
     ['parameters: { value: { type: \'json\', default: -0 } }', 'parameters.value.default must be lossless JSON data'],