diff --git a/.chronus/changes/add-xml-datetime-put-test-2026-3-16-3-9-2.md b/.chronus/changes/add-xml-datetime-put-test-2026-3-16-3-9-2.md
new file mode 100644
index 00000000000..9da462bf509
--- /dev/null
+++ b/.chronus/changes/add-xml-datetime-put-test-2026-3-16-3-9-2.md
@@ -0,0 +1,7 @@
+---
+changeKind: internal
+packages:
+  - "@typespec/http-client-python"
+---
+
+Add PUT test coverage for `ModelWithDatetime` XML payload scenario and bump `@typespec/http-specs`/`@typespec/spec-api` dependencies to include the datetime validation fix from PR #9995.
diff --git a/packages/http-client-python/generator/test/generic_mock_api_tests/asynctests/test_payload_xml_async.py b/packages/http-client-python/generator/test/generic_mock_api_tests/asynctests/test_payload_xml_async.py
index 7d88ecbbb5c..0cfccaee38a 100644
--- a/packages/http-client-python/generator/test/generic_mock_api_tests/asynctests/test_payload_xml_async.py
+++ b/packages/http-client-python/generator/test/generic_mock_api_tests/asynctests/test_payload_xml_async.py
@@ -138,6 +138,7 @@ async def test_model_with_datetime(client: XmlClient):
     result = await client.model_with_datetime_value.get()
     assert result.rfc3339 == model.rfc3339
     assert result.rfc7231 == model.rfc7231
+    await client.model_with_datetime_value.put(model)
 
 
 @pytest.mark.asyncio
diff --git a/packages/http-client-python/generator/test/generic_mock_api_tests/test_payload_xml.py b/packages/http-client-python/generator/test/generic_mock_api_tests/test_payload_xml.py
index a1918285168..22f1c6f7c79 100644
--- a/packages/http-client-python/generator/test/generic_mock_api_tests/test_payload_xml.py
+++ b/packages/http-client-python/generator/test/generic_mock_api_tests/test_payload_xml.py
@@ -124,6 +124,7 @@ def test_model_with_datetime(client: XmlClient):
     result = client.model_with_datetime_value.get()
     assert result.rfc3339 == model.rfc3339
     assert result.rfc7231 == model.rfc7231
+    client.model_with_datetime_value.put(model)
 
 
 def test_xml_error_value(client: XmlClient, core_library):
diff --git a/packages/http-client-python/package-lock.json b/packages/http-client-python/package-lock.json
index 3fa3f6f20e8..c2f0190749c 100644
--- a/packages/http-client-python/package-lock.json
+++ b/packages/http-client-python/package-lock.json
@@ -29,10 +29,10 @@
         "@typespec/compiler": "^1.10.0",
         "@typespec/events": "~0.80.0",
         "@typespec/http": "^1.10.0",
-        "@typespec/http-specs": "0.1.0-alpha.34",
+        "@typespec/http-specs": "0.1.0-alpha.35-dev.1",
         "@typespec/openapi": "^1.10.0",
         "@typespec/rest": "~0.80.0",
-        "@typespec/spec-api": "0.1.0-alpha.13",
+        "@typespec/spec-api": "0.1.0-alpha.14-dev.1",
         "@typespec/spector": "0.1.0-alpha.24",
         "@typespec/sse": "~0.80.0",
         "@typespec/streams": "~0.80.0",
@@ -2492,25 +2492,25 @@
       }
     },
     "node_modules/@typespec/http-specs": {
-      "version": "0.1.0-alpha.34",
-      "resolved": "https://registry.npmjs.org/@typespec/http-specs/-/http-specs-0.1.0-alpha.34.tgz",
-      "integrity": "sha512-xyOOFVUjBgZLYeDaoaZ6Mj6DoLjvDhhUvSRZIpWroAUHL+P30XR2wZ6dKLtOgF9uPn7S2MvpSvAAs4Z+mYh9YQ==",
+      "version": "0.1.0-alpha.35-dev.1",
+      "resolved": "https://registry.npmjs.org/@typespec/http-specs/-/http-specs-0.1.0-alpha.35-dev.1.tgz",
+      "integrity": "sha512-sL3Q9Nmgim1YdHiKTaO1bdaUdPIV+1o1HIT8VbTfgEPresdgxJSp2Mll5uehIoiDzGZ3M11Ka/Lrdijr5VRYiA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typespec/spec-api": "^0.1.0-alpha.13",
-        "@typespec/spector": "^0.1.0-alpha.24",
+        "@typespec/spec-api": "^0.1.0-alpha.13 || >= 0.1.0-alpha.14-dev.1",
+        "@typespec/spector": "^0.1.0-alpha.24 || >= 0.1.0-dev.0",
         "deep-equal": "^2.2.0"
       },
       "engines": {
         "node": ">=16.0.0"
       },
       "peerDependencies": {
-        "@typespec/compiler": "^1.10.0",
-        "@typespec/http": "^1.10.0",
-        "@typespec/rest": "^0.80.0",
-        "@typespec/versioning": "^0.80.0",
-        "@typespec/xml": "^0.80.0"
+        "@typespec/compiler": "^1.10.0 || >= 1.11.0-dev.0",
+        "@typespec/http": "^1.10.0 || >= 1.11.0-dev.0",
+        "@typespec/rest": "^0.80.0 || >= 0.81.0-dev.0",
+        "@typespec/versioning": "^0.80.0 || >= 0.81.0-dev.0",
+        "@typespec/xml": "^0.80.0 || >= 0.81.0-dev.0"
       }
     },
     "node_modules/@typespec/openapi": {
@@ -2542,9 +2542,9 @@
       }
     },
     "node_modules/@typespec/spec-api": {
-      "version": "0.1.0-alpha.13",
-      "resolved": "https://registry.npmjs.org/@typespec/spec-api/-/spec-api-0.1.0-alpha.13.tgz",
-      "integrity": "sha512-ed0qqGM92vKuangmENUYMeDQZpSlsEMYdeH7+wMl+bIgXzfZ7yv07fNwcmROzSEJd0CzdCTgz+Hp+ifmR4USNQ==",
+      "version": "0.1.0-alpha.14-dev.1",
+      "resolved": "https://registry.npmjs.org/@typespec/spec-api/-/spec-api-0.1.0-alpha.14-dev.1.tgz",
+      "integrity": "sha512-rRgTovGml78TbfHdpphzQDiZOyhgfCZE7U3GXF4PjFl3MXG5WWVGhL6s8gSGvfuwaOVO+lbMp5YKuNtJhy3zHw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/packages/http-client-python/package.json b/packages/http-client-python/package.json
index 68081dda5c8..c5305783f37 100644
--- a/packages/http-client-python/package.json
+++ b/packages/http-client-python/package.json
@@ -90,11 +90,11 @@
     "@typespec/versioning": "~0.80.0",
     "@typespec/events": "~0.80.0",
     "@typespec/spector": "0.1.0-alpha.24",
-    "@typespec/spec-api": "0.1.0-alpha.13",
+    "@typespec/spec-api": "0.1.0-alpha.14-dev.1",
     "@typespec/sse": "~0.80.0",
     "@typespec/streams": "~0.80.0",
     "@typespec/xml": "~0.80.0",
-    "@typespec/http-specs": "0.1.0-alpha.34",
+    "@typespec/http-specs": "0.1.0-alpha.35-dev.1",
     "@types/js-yaml": "~4.0.5",
     "@types/node": "~25.0.2",
     "@types/semver": "7.5.8",