diff --git a/src/components/Schema/__tests__/__snapshots__/DiscriminatorDropdown.test.tsx.snap b/src/components/Schema/__tests__/__snapshots__/DiscriminatorDropdown.test.tsx.snap
index b54d4f3eff..0daf93a6a1 100644
--- a/src/components/Schema/__tests__/__snapshots__/DiscriminatorDropdown.test.tsx.snap
+++ b/src/components/Schema/__tests__/__snapshots__/DiscriminatorDropdown.test.tsx.snap
@@ -76,12 +76,16 @@ exports[`Components SchemaView discriminator should correctly render discriminat
             "options": "<<<filtered>>>",
             "pattern": undefined,
             "rawSchema": Object {
+              "allOf": undefined,
               "default": undefined,
+              "parentRefs": Array [],
               "type": "string",
             },
             "readOnly": false,
             "schema": Object {
+              "allOf": undefined,
               "default": undefined,
+              "parentRefs": Array [],
               "type": "string",
             },
             "title": "",
diff --git a/src/services/OpenAPIParser.ts b/src/services/OpenAPIParser.ts
index 618bc1ee11..3bad8a5ae1 100644
--- a/src/services/OpenAPIParser.ts
+++ b/src/services/OpenAPIParser.ts
@@ -212,11 +212,18 @@ export class OpenAPIParser {
       }
 
       if (subSchema.properties !== undefined) {
-        // TODO: merge properties contents
-        receiver.properties = {
-          ...(receiver.properties || {}),
-          ...subSchema.properties,
-        };
+        receiver.properties = receiver.properties || {};
+        for (let prop in subSchema.properties) {
+          if (!receiver.properties[prop]) {
+            receiver.properties[prop] = subSchema.properties[prop];
+          } else {
+            // merge inner properties
+            receiver.properties[prop] = this.mergeAllOf(
+              { allOf: [receiver.properties[prop], subSchema.properties[prop]] },
+              $ref + '/properties/' + prop,
+            );
+          }
+        }
       }
 
       if (subSchema.required !== undefined) {