diff --git a/.chronus/changes/fix-http-specs-e2e-tests-2026-03-09.md b/.chronus/changes/fix-http-specs-e2e-tests-2026-03-09.md
new file mode 100644
index 00000000000..d697c19650b
--- /dev/null
+++ b/.chronus/changes/fix-http-specs-e2e-tests-2026-03-09.md
@@ -0,0 +1,8 @@
+---
+changeKind: internal
+packages:
+  - "@typespec/http-specs"
+  - "@typespec/spector"
+---
+
+Fix e2e test failures: duration header float scenarios, multipart file upload scenarios, XML pagination content-type mismatch, and response body data mismatch validation
diff --git a/packages/http-specs/package.json b/packages/http-specs/package.json
index 372bb5d077b..c1a95eaf74c 100644
--- a/packages/http-specs/package.json
+++ b/packages/http-specs/package.json
@@ -19,7 +19,7 @@
     "upload-coverage": "tsp-spector upload-coverage --generatorName @typespec/http-specs --generatorVersion 0.1.0-alpha.4 --containerName coverages --generatorMode standard --storageAccountName typespec",
     "validate-mock-apis": "tsp-spector validate-mock-apis ./specs",
     "check-scenario-coverage": "tsp-spector check-coverage ./specs",
-    "validate-client-server": "concurrently \"tsp-spector server start ./specs\" \"pnpm knock\"; tsp-spector server stop",
+    "validate-client-server": "concurrently \"tsp-spector server start ./specs\" \"pnpm knock\"; code=$?; tsp-spector server stop; exit $code",
     "build:smoke": "tsp compile smoke/petstore --warn-as-error --no-emit && tsp compile smoke/todoapp --warn-as-error --no-emit",
     "client": "pnpm knock",
     "knock": "tsp-spector knock ./specs",
diff --git a/packages/http-specs/specs/encode/duration/mockapi.ts b/packages/http-specs/specs/encode/duration/mockapi.ts
index 6a722fff8ff..c74a77d300b 100644
--- a/packages/http-specs/specs/encode/duration/mockapi.ts
+++ b/packages/http-specs/specs/encode/duration/mockapi.ts
@@ -295,6 +295,11 @@ function createHeaderFloatServerTests(uri: string, value: number) {
   return passOnSuccess({
     uri,
     method: "get",
+    request: {
+      headers: {
+        duration: String(value),
+      },
+    },
     response: {
       status: 204,
     },
diff --git a/packages/http-specs/specs/payload/multipart/mockapi.ts b/packages/http-specs/specs/payload/multipart/mockapi.ts
index 3ac7dbda70a..ea54b460201 100644
--- a/packages/http-specs/specs/payload/multipart/mockapi.ts
+++ b/packages/http-specs/specs/payload/multipart/mockapi.ts
@@ -437,9 +437,11 @@ Scenarios.Payload_MultiPart_FormData_File_uploadFileSpecificContentType = passOn
   uri: "/multipart/form-data/file/specific-content-type",
   method: "post",
   request: {
-    headers: {
-      "content-type": "multipart/form-data",
-    },
+    body: multipart({
+      files: [
+        { fieldname: "file", originalname: "image.png", buffer: pngFile, mimetype: "image/png" },
+      ],
+    }),
   },
   response: {
     status: 204,
@@ -460,9 +462,11 @@ Scenarios.Payload_MultiPart_FormData_File_uploadFileRequiredFilename = passOnSuc
   uri: "/multipart/form-data/file/required-filename",
   method: "post",
   request: {
-    headers: {
-      "content-type": "multipart/form-data",
-    },
+    body: multipart({
+      files: [
+        { fieldname: "file", originalname: "image.png", buffer: pngFile, mimetype: "image/png" },
+      ],
+    }),
   },
   response: {
     status: 204,
@@ -483,9 +487,12 @@ Scenarios.Payload_MultiPart_FormData_File_uploadFileArray = passOnSuccess({
   uri: "/multipart/form-data/file/file-array",
   method: "post",
   request: {
-    headers: {
-      "content-type": "multipart/form-data",
-    },
+    body: multipart({
+      files: [
+        { fieldname: "files", originalname: "image.png", buffer: pngFile, mimetype: "image/png" },
+        { fieldname: "files", originalname: "image.png", buffer: pngFile, mimetype: "image/png" },
+      ],
+    }),
   },
   response: {
     status: 204,
diff --git a/packages/http-specs/specs/payload/pageable/mockapi.ts b/packages/http-specs/specs/payload/pageable/mockapi.ts
index 3fdbf8c794e..c77b1328a1e 100644
--- a/packages/http-specs/specs/payload/pageable/mockapi.ts
+++ b/packages/http-specs/specs/payload/pageable/mockapi.ts
@@ -4,6 +4,7 @@ import {
   json,
   MockRequest,
   passOnSuccess,
+  ResolverConfig,
   ScenarioMockApi,
   ValidationError,
   xml,
@@ -553,7 +554,7 @@ Scenarios.Payload_Pageable_XmlPagination_listWithContinuation = passOnSuccess([
       status: 200,
       body: xml(XmlContTokenFirstPage),
       headers: {
-        "content-type": "application/xml",
+        "content-type": "application/xml; charset=utf-8",
       },
     },
     handler: (req: MockRequest) => {
@@ -590,7 +591,7 @@ Scenarios.Payload_Pageable_XmlPagination_listWithContinuation = passOnSuccess([
       status: 200,
       body: xml(XmlContTokenSecondPage),
       headers: {
-        "content-type": "application/xml",
+        "content-type": "application/xml; charset=utf-8",
       },
     },
     handler: (req: MockRequest) => {
@@ -659,9 +660,15 @@ Scenarios.Payload_Pageable_XmlPagination_listWithNextLink = passOnSuccess([
     request: {},
     response: {
       status: 200,
-      body: xml(xmlNextLinkFirstPage("PLACEHOLDER_BASE_URL")),
+      body: {
+        contentType: "application/xml",
+        rawContent: {
+          serialize: (config: ResolverConfig) =>
+            `<?xml version='1.0' encoding='UTF-8'?>` + xmlNextLinkFirstPage(config.baseUrl),
+        },
+      },
       headers: {
-        "content-type": "application/xml",
+        "content-type": "application/xml; charset=utf-8",
       },
     },
     handler: (req: MockRequest) => {
@@ -683,7 +690,7 @@ Scenarios.Payload_Pageable_XmlPagination_listWithNextLink = passOnSuccess([
       status: 200,
       body: xml(XmlNextLinkSecondPage),
       headers: {
-        "content-type": "application/xml",
+        "content-type": "application/xml; charset=utf-8",
       },
     },
     kind: "MockApiDefinition",
diff --git a/packages/spector/src/actions/server-test.ts b/packages/spector/src/actions/server-test.ts
index 6cd60ddbdf3..aeb1d8f2c3c 100644
--- a/packages/spector/src/actions/server-test.ts
+++ b/packages/spector/src/actions/server-test.ts
@@ -91,7 +91,7 @@ class ServerTestsGenerator {
       switch (body.contentType) {
         case "application/xml":
         case "text/plain":
-          if (body.rawContent !== responseData) {
+          if (raw !== responseData) {
             throw new ValidationError("Response data mismatch", raw, responseData);
           }
           break;