diff --git a/src/schemathesis/runner/__init__.py b/src/schemathesis/runner/__init__.py
index 852e2fd42f..e536ebaeff 100644
--- a/src/schemathesis/runner/__init__.py
+++ b/src/schemathesis/runner/__init__.py
@@ -446,6 +446,8 @@ def prepare(  # pylint: disable=too-many-arguments
 
     if "base_url" not in loader_options:
         loader_options["base_url"] = get_base_url(schema_uri)
+    if loader is from_uri and loader_options.get("auth"):
+        loader_options["auth"] = get_requests_auth(loader_options["auth"], loader_options.pop("auth_type", None))
     schema = loader(schema_uri, **loader_options)
     return execute_from_schema(
         schema,
diff --git a/test/cli/test_commands.py b/test/cli/test_commands.py
index 87bd780834..87cfa88dac 100644
--- a/test/cli/test_commands.py
+++ b/test/cli/test_commands.py
@@ -165,7 +165,10 @@ def test_commands_run_help(cli):
     (
         ([SCHEMA_URI], {"checks": DEFAULT_CHECKS, "loader": from_uri, "workers_num": 1}),
         ([SCHEMA_URI, "--checks=all"], {"checks": ALL_CHECKS, "loader": from_uri, "workers_num": 1}),
-        ([SCHEMA_URI, "--exitfirst"], {"checks": DEFAULT_CHECKS, "exit_first": True, "loader": from_uri, "workers_num": 1}),
+        (
+            [SCHEMA_URI, "--exitfirst"],
+            {"checks": DEFAULT_CHECKS, "exit_first": True, "loader": from_uri, "workers_num": 1},
+        ),
         (
             [SIMPLE_PATH, "--base-url=http://127.0.0.1"],
             {
@@ -227,13 +230,26 @@ def test_commands_run_help(cli):
         ),
         (
             [SCHEMA_URI, "--method=POST", "--method", "GET"],
-            {"checks": DEFAULT_CHECKS, "loader": from_uri, "loader_options": {"method": ("POST", "GET")}, "workers_num": 1},
+            {
+                "checks": DEFAULT_CHECKS,
+                "loader": from_uri,
+                "loader_options": {"method": ("POST", "GET")},
+                "workers_num": 1,
+            },
         ),
         (
             [SCHEMA_URI, "--endpoint=users"],
-            {"checks": DEFAULT_CHECKS, "loader": from_uri, "loader_options": {"endpoint": ("users",)}, "workers_num": 1},
+            {
+                "checks": DEFAULT_CHECKS,
+                "loader": from_uri,
+                "loader_options": {"endpoint": ("users",)},
+                "workers_num": 1,
+            },
+        ),
+        (
+            [SCHEMA_URI, "--tag=foo"],
+            {"checks": DEFAULT_CHECKS, "loader": from_uri, "loader_options": {"tag": ("foo",)}, "workers_num": 1},
         ),
-        ([SCHEMA_URI, "--tag=foo"], {"checks": DEFAULT_CHECKS, "loader": from_uri, "loader_options": {"tag": ("foo",)}, "workers_num": 1}),
         (
             [SCHEMA_URI, "--base-url=https://example.com/api/v1test"],
             {
@@ -243,7 +259,10 @@ def test_commands_run_help(cli):
                 "workers_num": 1,
             },
         ),
-        ([SCHEMA_URI, "--hypothesis-seed=123"], {"checks": DEFAULT_CHECKS, "loader": from_uri, "seed": 123, "workers_num": 1}),
+        (
+            [SCHEMA_URI, "--hypothesis-seed=123"],
+            {"checks": DEFAULT_CHECKS, "loader": from_uri, "seed": 123, "workers_num": 1},
+        ),
         (
             [
                 SCHEMA_URI,