diff --git a/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-2-0.yaml b/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-2-0.yaml
index 4da1a304a4..c3ec80bfb4 100644
--- a/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-2-0.yaml
+++ b/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-2-0.yaml
@@ -2,11 +2,21 @@ swagger: '2.0'
 info:
   title: Foo
   version: 0.1.0
+parameters:
+  test_id:
+    name: test_id
+    in: path
+    required: true
+    type: string
+    schema:
+      type: string
+      format: uuid
+      title: Test Id
 paths:
   /foo/{bar_id}:
     delete:
-      summary: Delete foo bar id
-      operationId: deleteFooBar
+      summary: Delete bar id
+      operationId: deleteBar
       responses:
         '200':
           description: Successful Response
diff --git a/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-3-0.yaml b/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-3-0.yaml
index f81f343e96..35837bb26d 100644
--- a/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-3-0.yaml
+++ b/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-3-0.yaml
@@ -2,11 +2,21 @@ openapi: 3.0.0
 info:
   title: Foo
   version: 0.1.0
+components:
+  parameters:
+    test_id:
+      name: test_id
+      in: path
+      required: true
+      schema:
+        type: string
+        format: uuid
+        title: Test Id
 paths:
   /foo/{bar_id}:
     delete:
-      summary: Delete foo bar id
-      operationId: deleteFooBar
+      summary: Delete bar id
+      operationId: deleteBar
       responses:
         '200':
           description: Successful Response
@@ -28,3 +38,37 @@ paths:
           type: string
           format: uuid
           title: Bar Id
+  /subscribe:
+    post:
+      description: subscribes a client
+      responses:
+        '201':
+          description: subscription successfully created
+          content:
+            application/json:
+              schema: {}
+      callbacks:
+        onData:
+          '{$request.query.callbackUrl}/data':
+            post:
+              requestBody:
+                description: subscription payload
+                content:
+                  application/json:
+                    schema:
+                      type: object
+                      properties:
+                        userData:
+                          type: string
+              parameters:
+                - name: baz_id
+                  in: path
+                  required: true
+                  schema:
+                    type: string
+                    format: uuid
+                    title: Baz Id
+              responses:
+                '202':
+                  description: "OK"
+
diff --git a/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-3-1.yaml b/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-3-1.yaml
index 10ba12c621..02f49f282b 100644
--- a/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-3-1.yaml
+++ b/packages/apidom-ls/test/fixtures/validation/oas/parameter-defined-within-path-template-3-1.yaml
@@ -2,11 +2,40 @@ openapi: 3.1.0
 info:
   title: Foo
   version: 0.1.0
+components:
+  parameters:
+    test_id:
+      name: test_id
+      in: path
+      required: true
+      schema:
+        type: string
+        format: uuid
+        title: Test Id
+webhooks:
+  newWebhook:
+    post:
+      requestBody:
+        description: new webook
+        content:
+          application/json:
+            schema: {}
+      parameters:
+        - name: hook_id
+          in: path
+          required: true
+          schema:
+            type: string
+            format: uuid
+            title: Hook Id
+      responses:
+        "200":
+          description: OK
 paths:
   /foo/{bar_id}:
     delete:
-      summary: Delete foo bar id
-      operationId: deleteFooBar
+      summary: Delete bar id
+      operationId: deleteBar
       responses:
         '200':
           description: Successful Response
@@ -28,3 +57,36 @@ paths:
           type: string
           format: uuid
           title: Bar Id
+  /subscribe:
+    post:
+      description: subscribes a client
+      responses:
+        '201':
+          description: subscription successfully created
+          content:
+            application/json:
+              schema: {}
+      callbacks:
+        onData:
+          '{$request.query.callbackUrl}/data':
+            post:
+              requestBody:
+                description: subscription payload
+                content:
+                  application/json:
+                    schema:
+                      type: object
+                      properties:
+                        userData:
+                          type: string
+              parameters:
+                - name: baz_id
+                  in: path
+                  required: true
+                  schema:
+                    type: string
+                    format: uuid
+                    title: Baz Id
+              responses:
+                '202':
+                  description: "OK"
diff --git a/packages/apidom-ls/test/validate.ts b/packages/apidom-ls/test/validate.ts
index 1926f37276..821fdb5b58 100644
--- a/packages/apidom-ls/test/validate.ts
+++ b/packages/apidom-ls/test/validate.ts
@@ -3580,7 +3580,7 @@ describe('apidom-ls-validate', function () {
     const result = await languageService.doValidation(doc, validationContext);
     const expected: Diagnostic[] = [
       {
-        range: { start: { line: 16, character: 8 }, end: { line: 23, character: 23 } },
+        range: { start: { line: 26, character: 8 }, end: { line: 33, character: 23 } },
         message: 'parameter is not defined within path template',
         severity: 1,
         code: 3102000,
@@ -3622,7 +3622,7 @@ describe('apidom-ls-validate', function () {
     const result = await languageService.doValidation(doc, validationContext);
     const expected: Diagnostic[] = [
       {
-        range: { start: { line: 16, character: 8 }, end: { line: 22, character: 23 } },
+        range: { start: { line: 26, character: 8 }, end: { line: 32, character: 23 } },
         message: 'parameter is not defined within path template',
         severity: 1,
         code: 3102000,
@@ -3664,7 +3664,7 @@ describe('apidom-ls-validate', function () {
     const result = await languageService.doValidation(doc, validationContext);
     const expected: Diagnostic[] = [
       {
-        range: { start: { line: 16, character: 8 }, end: { line: 22, character: 23 } },
+        range: { start: { line: 45, character: 8 }, end: { line: 51, character: 23 } },
         message: 'parameter is not defined within path template',
         severity: 1,
         code: 3102000,