diff --git a/src/schemathesis/cli/callbacks.py b/src/schemathesis/cli/callbacks.py
index cbcb45a1a4..1224800100 100644
--- a/src/schemathesis/cli/callbacks.py
+++ b/src/schemathesis/cli/callbacks.py
@@ -12,13 +12,14 @@
 
 
 def validate_schema(ctx: click.core.Context, param: click.core.Parameter, raw_value: str) -> str:
-    if "app" not in ctx.params and not urlparse(raw_value).netloc:
-        if "\x00" in raw_value or not utils.file_exists(raw_value):
-            raise click.UsageError("Invalid SCHEMA, must be a valid URL or file path.")
-        if "base_url" not in ctx.params:
-            raise click.UsageError('Missing argument, "--base-url" is required for SCHEMA specified by file.')
-    else:
-        _validate_url(raw_value)
+    if "app" not in ctx.params:
+        if not urlparse(raw_value).netloc:
+            if "\x00" in raw_value or not utils.file_exists(raw_value):
+                raise click.UsageError("Invalid SCHEMA, must be a valid URL or file path.")
+            if "base_url" not in ctx.params:
+                raise click.UsageError('Missing argument, "--base-url" is required for SCHEMA specified by file.')
+        else:
+            _validate_url(raw_value)
     return raw_value