diff --git a/.changes/nextrelease/multi-auth-updates.json b/.changes/nextrelease/multi-auth-updates.json
new file mode 100644
index 0000000000..f2ccb84995
--- /dev/null
+++ b/.changes/nextrelease/multi-auth-updates.json
@@ -0,0 +1,7 @@
+[
+  {
+    "type": "bugfix",
+    "category": "Auth",
+    "description": "Corrects an issue with modeling for `noAuth` auth types."
+  }
+]
diff --git a/src/Auth/AuthSchemeResolver.php b/src/Auth/AuthSchemeResolver.php
index 69f3ddb7c2..b477468094 100644
--- a/src/Auth/AuthSchemeResolver.php
+++ b/src/Auth/AuthSchemeResolver.php
@@ -23,7 +23,7 @@ class AuthSchemeResolver implements AuthSchemeResolverInterface
         'aws.auth#sigv4' => 'v4',
         'aws.auth#sigv4a' => 'v4a',
         'smithy.api#httpBearerAuth' => 'bearer',
-        'smithy.auth#noAuth' => 'anonymous'
+        'smithy.api#noAuth' => 'anonymous'
     ];
 
     /**
diff --git a/tests/Auth/AuthSchemeResolverTest.php b/tests/Auth/AuthSchemeResolverTest.php
index e57fbf8b16..5a05e67f76 100644
--- a/tests/Auth/AuthSchemeResolverTest.php
+++ b/tests/Auth/AuthSchemeResolverTest.php
@@ -83,7 +83,7 @@ public function schemeForIdentityProvider()
               'v4a'
           ],
           [
-              ['smithy.auth#noAuth'],
+              ['smithy.api#noAuth'],
               'anonymous'
           ],
         ];
@@ -169,7 +169,7 @@ public function testMissingRequiredIdentityThrows()
         $tokenProvider = $credentialProvider;
 
         $resolver = new AuthSchemeResolver($credentialProvider, $tokenProvider);
-        $resolver->selectAuthScheme(['aws.auth#sigv4', 'smithy.auth#noAuth', 'smithy.api#httpBearerAuth']);
+        $resolver->selectAuthScheme(['aws.auth#sigv4', 'smithy.api#noAuth', 'smithy.api#httpBearerAuth']);
     }
 
     public function testUnmetV4aRequirementsThrows()
diff --git a/tests/Auth/AuthSelectionMiddlewareTest.php b/tests/Auth/AuthSelectionMiddlewareTest.php
index 9f58f9a49b..a73e15a1ed 100644
--- a/tests/Auth/AuthSelectionMiddlewareTest.php
+++ b/tests/Auth/AuthSelectionMiddlewareTest.php
@@ -85,7 +85,7 @@ public function ResolvesAuthSchemeWithoutCRTProvider()
             ],
             [
                 ['aws.auth#sigv4', 'aws.auth#sigv4a'],
-                ['smithy.auth#noAuth'],
+                ['smithy.api#noAuth'],
                 'anonymous'
             ],
             [
@@ -152,7 +152,7 @@ public function ResolvesAuthSchemeWithCRTprovider()
             ],
             [
                 ['aws.auth#sigv4', 'aws.auth#sigv4a'],
-                ['smithy.auth#noAuth'],
+                ['smithy.api#noAuth'],
                 'anonymous'
             ],
             [