diff --git a/src/wp-includes/rest-api.php b/src/wp-includes/rest-api.php
index fd6dc3e5f9..3b158ea07f 100644
--- a/src/wp-includes/rest-api.php
+++ b/src/wp-includes/rest-api.php
@@ -324,6 +324,11 @@ function get_rest_url( $blog_id = null, $path = '/', $scheme = 'rest' ) {
 		$url .= '/' . ltrim( $path, '/' );
 	} else {
 		$url = trailingslashit( get_home_url( $blog_id, '', $scheme ) );
+		// nginx only allows HTTP/1.0 methods when redirecting from / to /index.php
+		// To work around this, we manually add index.php to the URL, avoiding the redirect.
+		if ( 'index.php' !== substr( $url, 9 ) ) {
+			$url .= 'index.php';
+		}
 
 		$path = '/' . ltrim( $path, '/' );
 
diff --git a/tests/phpunit/tests/oembed/controller.php b/tests/phpunit/tests/oembed/controller.php
index 529811ceb8..9f9aa6dd46 100644
--- a/tests/phpunit/tests/oembed/controller.php
+++ b/tests/phpunit/tests/oembed/controller.php
@@ -416,16 +416,16 @@ class Test_oEmbed_Controller extends WP_UnitTestCase {
 	}
 
 	function test_get_oembed_endpoint_url() {
-		$this->assertEquals( home_url() . '/?rest_route=/oembed/1.0/embed', get_oembed_endpoint_url() );
-		$this->assertEquals( home_url() . '/?rest_route=/oembed/1.0/embed', get_oembed_endpoint_url( '', 'json' ) );
-		$this->assertEquals( home_url() . '/?rest_route=/oembed/1.0/embed', get_oembed_endpoint_url( '', 'xml' ) );
+		$this->assertEquals( home_url() . '/index.php?rest_route=/oembed/1.0/embed', get_oembed_endpoint_url() );
+		$this->assertEquals( home_url() . '/index.php?rest_route=/oembed/1.0/embed', get_oembed_endpoint_url( '', 'json' ) );
+		$this->assertEquals( home_url() . '/index.php?rest_route=/oembed/1.0/embed', get_oembed_endpoint_url( '', 'xml' ) );
 
 		$post_id     = $this->factory()->post->create();
 		$url         = get_permalink( $post_id );
 		$url_encoded = urlencode( $url );
 
-		$this->assertEquals( home_url() . '/?rest_route=%2Foembed%2F1.0%2Fembed&url=' . $url_encoded, get_oembed_endpoint_url( $url ) );
-		$this->assertEquals( home_url() . '/?rest_route=%2Foembed%2F1.0%2Fembed&url=' . $url_encoded . '&format=xml', get_oembed_endpoint_url( $url, 'xml' ) );
+		$this->assertEquals( home_url() . '/index.php?rest_route=%2Foembed%2F1.0%2Fembed&url=' . $url_encoded, get_oembed_endpoint_url( $url ) );
+		$this->assertEquals( home_url() . '/index.php?rest_route=%2Foembed%2F1.0%2Fembed&url=' . $url_encoded . '&format=xml', get_oembed_endpoint_url( $url, 'xml' ) );
 	}
 
 	function test_get_oembed_endpoint_url_pretty_permalinks() {
diff --git a/tests/phpunit/tests/rest-api.php b/tests/phpunit/tests/rest-api.php
index f303a0130b..689cbdfbae 100644
--- a/tests/phpunit/tests/rest-api.php
+++ b/tests/phpunit/tests/rest-api.php
@@ -314,9 +314,9 @@ class Tests_REST_API extends WP_UnitTestCase {
 
 		// In non-pretty case, we get a query string to invoke the rest router.
 		$this->set_permalink_structure( '' );
-		$this->assertEquals( 'http://' . WP_TESTS_DOMAIN . '/?rest_route=/', get_rest_url() );
-
+		$this->assertEquals( 'http://' . WP_TESTS_DOMAIN . '/index.php?rest_route=/', get_rest_url() );
 	}
+
 	/**
 	 * @ticket 34299
 	 */
diff --git a/tests/phpunit/tests/rest-api/rest-request.php b/tests/phpunit/tests/rest-api/rest-request.php
index b7f043d6e7..b9684f4425 100644
--- a/tests/phpunit/tests/rest-api/rest-request.php
+++ b/tests/phpunit/tests/rest-api/rest-request.php
@@ -547,7 +547,7 @@ class Tests_REST_Request extends WP_UnitTestCase {
 			),
 			array(
 				'permalink_structure' => '',
-				'original_url'        => 'http://' . WP_TESTS_DOMAIN . '/?rest_route=%2Fwp%2Fv2%2Fposts%2F1&foo=bar',
+				'original_url'        => 'http://' . WP_TESTS_DOMAIN . '/index.php?rest_route=%2Fwp%2Fv2%2Fposts%2F1&foo=bar',
 			),
 		);
 	}
diff --git a/tests/qunit/fixtures/wp-api-generated.js b/tests/qunit/fixtures/wp-api-generated.js
index ecfc346f11..fa31a4e41e 100644
--- a/tests/qunit/fixtures/wp-api-generated.js
+++ b/tests/qunit/fixtures/wp-api-generated.js
@@ -37,7 +37,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/"
+                "self": "http://example.org/index.php?rest_route=/"
             }
         },
         "/oembed/1.0": {
@@ -63,7 +63,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/oembed/1.0"
+                "self": "http://example.org/index.php?rest_route=/oembed/1.0"
             }
         },
         "/oembed/1.0/embed": {
@@ -92,7 +92,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/oembed/1.0/embed"
+                "self": "http://example.org/index.php?rest_route=/oembed/1.0/embed"
             }
         },
         "/oembed/1.0/proxy": {
@@ -142,7 +142,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/oembed/1.0/proxy"
+                "self": "http://example.org/index.php?rest_route=/oembed/1.0/proxy"
             }
         },
         "/wp/v2": {
@@ -168,7 +168,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2"
+                "self": "http://example.org/index.php?rest_route=/wp/v2"
             }
         },
         "/wp/v2/posts": {
@@ -495,7 +495,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/posts"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/posts"
             }
         },
         "/wp/v2/posts/(?P<id>[\\d]+)": {
@@ -1066,7 +1066,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/pages"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/pages"
             }
         },
         "/wp/v2/pages/(?P<id>[\\d]+)": {
@@ -1604,7 +1604,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/media"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/media"
             }
         },
         "/wp/v2/media/(?P<id>[\\d]+)": {
@@ -1788,7 +1788,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/types"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/types"
             }
         },
         "/wp/v2/types/(?P<type>[\\w-]+)": {
@@ -1848,7 +1848,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/statuses"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/statuses"
             }
         },
         "/wp/v2/statuses/(?P<status>[\\w-]+)": {
@@ -1913,7 +1913,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/taxonomies"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/taxonomies"
             }
         },
         "/wp/v2/taxonomies/(?P<taxonomy>[\\w-]+)": {
@@ -2090,7 +2090,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/categories"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/categories"
             }
         },
         "/wp/v2/categories/(?P<id>[\\d]+)": {
@@ -2323,7 +2323,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/tags"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/tags"
             }
         },
         "/wp/v2/tags/(?P<id>[\\d]+)": {
@@ -2603,7 +2603,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/users"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/users"
             }
         },
         "/wp/v2/users/(?P<id>[\\d]+)": {
@@ -2885,7 +2885,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/users/me"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/users/me"
             }
         },
         "/wp/v2/comments": {
@@ -3129,7 +3129,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/comments"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/comments"
             }
         },
         "/wp/v2/comments/(?P<id>[\\d]+)": {
@@ -3383,7 +3383,7 @@ mockedApiResponse.Schema = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/wp/v2/settings"
+                "self": "http://example.org/index.php?rest_route=/wp/v2/settings"
             }
         }
     }
@@ -3415,7 +3415,7 @@ mockedApiResponse.oembed = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/oembed/1.0"
+                "self": "http://example.org/index.php?rest_route=/oembed/1.0"
             }
         },
         "/oembed/1.0/embed": {
@@ -3444,7 +3444,7 @@ mockedApiResponse.oembed = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/oembed/1.0/embed"
+                "self": "http://example.org/index.php?rest_route=/oembed/1.0/embed"
             }
         },
         "/oembed/1.0/proxy": {
@@ -3494,7 +3494,7 @@ mockedApiResponse.oembed = {
                 }
             ],
             "_links": {
-                "self": "http://example.org/?rest_route=/oembed/1.0/proxy"
+                "self": "http://example.org/index.php?rest_route=/oembed/1.0/proxy"
             }
         }
     }
@@ -3573,12 +3573,12 @@ mockedApiResponse.PostsCollection = [
             ],
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/posts"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/posts"
                 }
             ],
             "about": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/types/post"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/types/post"
                 }
             ],
             "replies": [
@@ -3754,12 +3754,12 @@ mockedApiResponse.PagesCollection = [
             ],
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/pages"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/pages"
                 }
             ],
             "about": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/types/page"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/types/page"
                 }
             ],
             "replies": [
@@ -3920,12 +3920,12 @@ mockedApiResponse.MediaCollection = [
             ],
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/media"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/media"
                 }
             ],
             "about": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/types/attachment"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/types/attachment"
                 }
             ],
             "replies": [
@@ -3987,12 +3987,12 @@ mockedApiResponse.TypesCollection = {
         "_links": {
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/types"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/types"
                 }
             ],
             "wp:items": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/posts"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/posts"
                 }
             ],
             "curies": [
@@ -4014,12 +4014,12 @@ mockedApiResponse.TypesCollection = {
         "_links": {
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/types"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/types"
                 }
             ],
             "wp:items": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/pages"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/pages"
                 }
             ],
             "curies": [
@@ -4041,12 +4041,12 @@ mockedApiResponse.TypesCollection = {
         "_links": {
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/types"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/types"
                 }
             ],
             "wp:items": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/media"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/media"
                 }
             ],
             "curies": [
@@ -4081,7 +4081,7 @@ mockedApiResponse.StatusesCollection = {
         "_links": {
             "archives": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/posts"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/posts"
                 }
             ]
         }
@@ -4094,7 +4094,7 @@ mockedApiResponse.StatusesCollection = {
         "_links": {
             "archives": [
                 {
-                    "href": "http://example.org/?rest_route=%2Fwp%2Fv2%2Fposts&status=future"
+                    "href": "http://example.org/index.php?rest_route=%2Fwp%2Fv2%2Fposts&status=future"
                 }
             ]
         }
@@ -4107,7 +4107,7 @@ mockedApiResponse.StatusesCollection = {
         "_links": {
             "archives": [
                 {
-                    "href": "http://example.org/?rest_route=%2Fwp%2Fv2%2Fposts&status=draft"
+                    "href": "http://example.org/index.php?rest_route=%2Fwp%2Fv2%2Fposts&status=draft"
                 }
             ]
         }
@@ -4120,7 +4120,7 @@ mockedApiResponse.StatusesCollection = {
         "_links": {
             "archives": [
                 {
-                    "href": "http://example.org/?rest_route=%2Fwp%2Fv2%2Fposts&status=pending"
+                    "href": "http://example.org/index.php?rest_route=%2Fwp%2Fv2%2Fposts&status=pending"
                 }
             ]
         }
@@ -4133,7 +4133,7 @@ mockedApiResponse.StatusesCollection = {
         "_links": {
             "archives": [
                 {
-                    "href": "http://example.org/?rest_route=%2Fwp%2Fv2%2Fposts&status=private"
+                    "href": "http://example.org/index.php?rest_route=%2Fwp%2Fv2%2Fposts&status=private"
                 }
             ]
         }
@@ -4146,7 +4146,7 @@ mockedApiResponse.StatusesCollection = {
         "_links": {
             "archives": [
                 {
-                    "href": "http://example.org/?rest_route=%2Fwp%2Fv2%2Fposts&status=trash"
+                    "href": "http://example.org/index.php?rest_route=%2Fwp%2Fv2%2Fposts&status=trash"
                 }
             ]
         }
@@ -4173,12 +4173,12 @@ mockedApiResponse.TaxonomiesCollection = {
         "_links": {
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/taxonomies"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/taxonomies"
                 }
             ],
             "wp:items": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/categories"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/categories"
                 }
             ],
             "curies": [
@@ -4202,12 +4202,12 @@ mockedApiResponse.TaxonomiesCollection = {
         "_links": {
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/taxonomies"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/taxonomies"
                 }
             ],
             "wp:items": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/tags"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/tags"
                 }
             ],
             "curies": [
@@ -4246,22 +4246,22 @@ mockedApiResponse.CategoriesCollection = [
         "_links": {
             "self": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/categories/1"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/categories/1"
                 }
             ],
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/categories"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/categories"
                 }
             ],
             "about": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/taxonomies/category"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/taxonomies/category"
                 }
             ],
             "wp:post_type": [
                 {
-                    "href": "http://example.org/?rest_route=%2Fwp%2Fv2%2Fposts&categories=1"
+                    "href": "http://example.org/index.php?rest_route=%2Fwp%2Fv2%2Fposts&categories=1"
                 }
             ],
             "curies": [
@@ -4305,12 +4305,12 @@ mockedApiResponse.TagsCollection = [
             ],
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/tags"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/tags"
                 }
             ],
             "about": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/taxonomies/post_tag"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/taxonomies/post_tag"
                 }
             ],
             "wp:post_type": [
@@ -4357,12 +4357,12 @@ mockedApiResponse.UsersCollection = [
         "_links": {
             "self": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/users/1"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/users/1"
                 }
             ],
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/users"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/users"
                 }
             ]
         }
@@ -4388,7 +4388,7 @@ mockedApiResponse.UsersCollection = [
             ],
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/users"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/users"
                 }
             ]
         }
@@ -4455,7 +4455,7 @@ mockedApiResponse.CommentsCollection = [
             ],
             "collection": [
                 {
-                    "href": "http://example.org/?rest_route=/wp/v2/comments"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/comments"
                 }
             ],
             "up": [