diff --git a/packages/autorest.python/autorest/postprocess/venvtools.py b/packages/autorest.python/autorest/postprocess/venvtools.py
index ebacce9eda1..1c24d8f8ba4 100644
--- a/packages/autorest.python/autorest/postprocess/venvtools.py
+++ b/packages/autorest.python/autorest/postprocess/venvtools.py
@@ -48,7 +48,7 @@ def create(
 
 
 def python_run(  # pylint: disable=inconsistent-return-statements
-    venv_context, module, command, directory=_ROOT_DIR, *, error_ok=False
+    venv_context, module, command, directory=_ROOT_DIR
 ) -> Optional[str]:
     try:
         cmd_line = [
@@ -70,6 +70,5 @@ def python_run(  # pylint: disable=inconsistent-return-statements
                 return f.read()
     except subprocess.CalledProcessError as err:
         print(err)
-        if not error_ok:
-            sys.exit(1)
+        sys.exit(1)
     return None
diff --git a/packages/autorest.python/venvtools.py b/packages/autorest.python/venvtools.py
index 978b17d62ad..2894e5a4796 100644
--- a/packages/autorest.python/venvtools.py
+++ b/packages/autorest.python/venvtools.py
@@ -56,7 +56,7 @@ def create_venv_with_package(packages):
             subprocess.check_call(pip_call + packages)
         yield myenv
 
-def python_run(venv_context, module, command=None, *, additional_dir=".", error_ok=False):
+def python_run(venv_context, module, command=None, *, additional_dir="."):
     try:
         cmd_line= [
             venv_context.env_exe,
@@ -70,5 +70,4 @@ def python_run(venv_context, module, command=None, *, additional_dir=".", error_
         )
     except subprocess.CalledProcessError as err:
         print(err)
-        if not error_ok:
-            sys.exit(1)
+        sys.exit(1)
diff --git a/packages/cadl-python/src/emitter.ts b/packages/cadl-python/src/emitter.ts
index 9404a070c5e..80f52ad9d65 100644
--- a/packages/cadl-python/src/emitter.ts
+++ b/packages/cadl-python/src/emitter.ts
@@ -32,19 +32,15 @@ import {
     getFormat,
     getMinItems,
     getMaxItems,
-    getNamespaceFullName,
     EmitContext,
     listServices,
     Union,
     isNullType,
     SyntaxKind,
-    emitFile,
     Type,
-    getKnownValues,
 } from "@cadl-lang/compiler";
 import {
     getAuthentication,
-    getContentTypes,
     getHeaderFieldName,
     getHttpOperation,
     getPathParamName,
@@ -52,7 +48,6 @@ import {
     getServers,
     HttpAuth,
     HttpOperationParameter,
-    HttpOperationParameters,
     HttpOperationRequestBody,
     HttpOperationResponse,
     HttpOperationResponseContent,
@@ -72,10 +67,11 @@ import {
     DpgContext,
 } from "@azure-tools/cadl-dpg";
 import { getResourceOperation } from "@cadl-lang/rest";
-import { execAsync, resolveModuleRoot, saveCodeModelAsYaml } from "./external-process.js";
+import { resolveModuleRoot, saveCodeModelAsYaml } from "./external-process.js";
 import { dirname } from "path";
 import { fileURLToPath } from "url";
 import { dump } from "js-yaml";
+import { execFileSync } from "child_process";
 
 interface HttpServerParameter {
     type: "endpointPath";
@@ -152,7 +148,7 @@ export async function $onEmit(context: EmitContext<EmitterOptions>) {
         commandArgs.push("--debug");
     }
     if (!program.compilerOptions.noEmit && !program.hasError()) {
-        await execAsync(process.execPath, commandArgs);
+        execFileSync(process.execPath, commandArgs);
     }
 }
 
@@ -1256,7 +1252,7 @@ function getNamespaces(context: DpgContext): Set<string> {
 
 function emitCodeModel(context: EmitContext<EmitterOptions>) {
     const dpgContext = createDpgContext(context);
-    const clientNamespaceString = getClientNamespaceString(dpgContext);
+    const clientNamespaceString = getClientNamespaceString(dpgContext)?.toLowerCase();
     // Get types
     const codeModel: Record<string, any> = {
         namespace: clientNamespaceString,
diff --git a/packages/cadl-python/tasks.py b/packages/cadl-python/tasks.py
index 4892de069ea..4369010e032 100644
--- a/packages/cadl-python/tasks.py
+++ b/packages/cadl-python/tasks.py
@@ -50,10 +50,10 @@ def _run_cadl(cmds):
 
 def _run_single_cadl(cmd):
   result = run(cmd, warn=True)
-  if result.ok or result.return_code is None:
+  if result.ok:
     print(Fore.GREEN + f'Call "{cmd}" done with success')
     return True
   print(Fore.RED + f'Call "{cmd}" failed with {result.return_code}\n{result.stdout}\n{result.stderr}')
-  output_folder = re.findall(r"--output-path=([^\s]+)", cmd)[0]
+  output_folder = re.findall(r"--output-dir=([^\s]+)", cmd)[0]
   shutil.rmtree(output_folder, ignore_errors=True)
   return False