diff --git a/README.md b/README.md
index 2910de45..010180b5 100644
--- a/README.md
+++ b/README.md
@@ -320,7 +320,6 @@ The following tests are not yet implemented and therefore missing:
 - Mandatory Test 6.1.54
 - Mandatory Test 6.1.55
 - Mandatory Test 6.1.59
-- Mandatory Test 6.1.60.1
 - Mandatory Test 6.1.60.2
 - Mandatory Test 6.1.60.3
 
@@ -463,6 +462,7 @@ export const mandatoryTest_6_1_53: DocumentTest
 export const mandatoryTest_6_1_57: DocumentTest
 export const mandatoryTest_6_1_58: DocumentTest
 export const mandatoryTest_6_1_61: DocumentTest
+export const mandatoryTest_6_1_60_1: DocumentTest
 ```
 
 [(back to top)](#bsi-csaf-validator-lib)
diff --git a/csaf_2_1/csafAjv.js b/csaf_2_1/csafAjv.js
index 9c05c814..429f5d87 100644
--- a/csaf_2_1/csafAjv.js
+++ b/csaf_2_1/csafAjv.js
@@ -26,7 +26,7 @@ csafAjv.addSchema(cvss_v3_1, 'https://www.first.org/cvss/cvss-v3.1.json')
 csafAjv.addSchema(cvss_meta, 'https://www.first.org/cvss/meta.json')
 csafAjv.addSchema(
   content_schema,
-  'https://docs.oasis-open.org/csaf/csaf/v2.1/schema/extension-metaschema.json#/$defs/content_schema_t'
+  'https://docs.oasis-open.org/csaf/csaf/v2.1/schema/extension-metaschema.json'
 )
 csafAjv.addSchema(
   meta_format_assertion,
diff --git a/csaf_2_1/csafAjv/content_schema.js b/csaf_2_1/csafAjv/content_schema.js
index a985c9bb..cdee0f62 100644
--- a/csaf_2_1/csafAjv/content_schema.js
+++ b/csaf_2_1/csafAjv/content_schema.js
@@ -194,7 +194,7 @@ export default {
               uniqueItems: true,
               items: {
                 type: 'string',
-                enum: ['critical', 'high_value', 'informational'],
+                enum: ['essential', 'significant', 'supplementary'],
               },
             },
           },
diff --git a/csaf_2_1/csafAjv/extension-content.js b/csaf_2_1/csafAjv/extension-content.js
index 9a79f18c..031fc052 100644
--- a/csaf_2_1/csafAjv/extension-content.js
+++ b/csaf_2_1/csafAjv/extension-content.js
@@ -18,7 +18,7 @@ export default {
       title: 'Extension Category',
       description: 'Holds the category of the extension content.',
       type: 'string',
-      enum: ['critical', 'high_value', 'informational'],
+      enum: ['essential', 'significant', 'supplementary'],
     },
     content: {
       title: 'Content',
diff --git a/csaf_2_1/mandatoryTests.js b/csaf_2_1/mandatoryTests.js
index bf9715a3..801a2a1e 100644
--- a/csaf_2_1/mandatoryTests.js
+++ b/csaf_2_1/mandatoryTests.js
@@ -65,6 +65,7 @@ export { mandatoryTest_6_1_45 } from './mandatoryTests/mandatoryTest_6_1_45.js'
 export { mandatoryTest_6_1_46 } from './mandatoryTests/mandatoryTest_6_1_46.js'
 export { mandatoryTest_6_1_51 } from './mandatoryTests/mandatoryTest_6_1_51.js'
 export { mandatoryTest_6_1_52 } from './mandatoryTests/mandatoryTest_6_1_52.js'
+export { mandatoryTest_6_1_60_1 } from './mandatoryTests/mandatoryTest_6_1_60_1.js'
 export { mandatoryTest_6_1_53 } from './mandatoryTests/mandatoryTest_6_1_53.js'
 export { mandatoryTest_6_1_57 } from './mandatoryTests/mandatoryTest_6_1_57.js'
 export { mandatoryTest_6_1_58 } from './mandatoryTests/mandatoryTest_6_1_58.js'
diff --git a/csaf_2_1/mandatoryTests/mandatoryTest_6_1_60_1.js b/csaf_2_1/mandatoryTests/mandatoryTest_6_1_60_1.js
new file mode 100644
index 00000000..65daa2c3
--- /dev/null
+++ b/csaf_2_1/mandatoryTests/mandatoryTest_6_1_60_1.js
@@ -0,0 +1,49 @@
+import { walkPath } from '../../lib/walkPaths.js'
+import csafAjv from '../csafAjv.js'
+
+const X_EXTENSIONS_PATHS /** @type {string[]} */ = [
+  '/document/x_extensions[]',
+  '/product_tree/branches[*]/product/x_extensions[]',
+  '/product_tree/full_product_names[]/x_extensions[]',
+  '/product_tree/product_paths[]/full_product_name/x_extensions[]',
+  '/vulnerabilities[]/metrics[]/content/x_extensions[]',
+  '/vulnerabilities[]/x_extensions[]',
+  '/x_extensions[]',
+]
+
+const validateExtensionContent = csafAjv.getSchema(
+  'https://docs.oasis-open.org/csaf/csaf/v2.1/schema/extension-content.json'
+)
+
+/**
+ * This implements the mandatory test 6.1.60.1 of the CSAF 2.1 standard.
+ *
+ *
+ * @param {unknown} doc
+ */
+export async function mandatoryTest_6_1_60_1(doc) {
+  const ctx = {
+    errors:
+      /** @type {Array<{ instancePath: string; message: string }>} */ ([]),
+    isValid: true,
+  }
+
+  if (typeof validateExtensionContent !== 'function') return ctx
+
+  for (const path of X_EXTENSIONS_PATHS) {
+    await walkPath(doc, path, async (instancePath, value) => {
+      if (!validateExtensionContent(value)) {
+        ctx.isValid = false
+        const ajvErrors = validateExtensionContent.errors ?? []
+        ajvErrors.forEach((err) => {
+          ctx.errors.push({
+            instancePath: `${instancePath}${err.instancePath}`,
+            message: err.message ?? 'invalid extension content',
+          })
+        })
+      }
+    })
+  }
+
+  return ctx
+}
diff --git a/tests/csaf_2_1/mandatoryTest_6_1_60_1.js b/tests/csaf_2_1/mandatoryTest_6_1_60_1.js
new file mode 100644
index 00000000..4d99a1b3
--- /dev/null
+++ b/tests/csaf_2_1/mandatoryTest_6_1_60_1.js
@@ -0,0 +1,24 @@
+import assert from 'node:assert/strict'
+import csafAjv from '../../csaf_2_1/csafAjv.js'
+
+describe('mandatoryTest_6_1_60_1', function () {
+  it('returns a valid empty result when the extension-content schema is unavailable', async function () {
+    const originalGetSchema = csafAjv.getSchema.bind(csafAjv)
+    csafAjv.getSchema = () => undefined
+
+    let result
+    try {
+      const freshModule = await import(
+        '../../csaf_2_1/mandatoryTests/mandatoryTest_6_1_60_1.js?guard-test=' +
+          Date.now()
+      )
+      result = await freshModule.mandatoryTest_6_1_60_1({
+        x_extensions: { foo: 'bar' },
+      })
+    } finally {
+      csafAjv.getSchema = originalGetSchema
+    }
+
+    assert.deepEqual(result, { errors: [], isValid: true })
+  })
+})
diff --git a/tests/csaf_2_1/oasis.js b/tests/csaf_2_1/oasis.js
index f6b8d926..abc93671 100644
--- a/tests/csaf_2_1/oasis.js
+++ b/tests/csaf_2_1/oasis.js
@@ -22,7 +22,6 @@ const excluded = [
   '6.1.55',
   '6.1.56',
   '6.1.59',
-  '6.1.60.1',
   '6.1.60.2',
   '6.1.60.3',
   '6.2.11',