diff --git a/osc/connection.py b/osc/connection.py
index 856804eb29..b4f3496fdd 100644
--- a/osc/connection.py
+++ b/osc/connection.py
@@ -141,12 +141,12 @@ def http_request_wrap_file(func):
     Turn file path into a file object and close it automatically
     by using a context manager.
     """
-    def new_func(method, url, headers=None, data=None, file=None, retry_on_400: bool = True):
+    def new_func(method, url, headers=None, data=None, file=None):
         if file:
             with open(file, "rb") as f:
-                return func(method, url, headers, data, f, retry_on_400)
+                return func(method, url, headers, data, file=f)
         else:
-            return func(method, url, headers, data, file, retry_on_400)
+            return func(method, url, headers, data, file)
 
     new_func.__name__ = func.__name__
     new_func.__doc__ = func.__doc__
@@ -154,7 +154,7 @@ def new_func(method, url, headers=None, data=None, file=None, retry_on_400: bool
 
 
 @http_request_wrap_file
-def http_request(method: str, url: str, headers=None, data=None, file=None, retry_on_400: bool = True):
+def http_request(method: str, url: str, headers=None, data=None, file=None):
     """
     Send a HTTP request to a server.
 
@@ -174,7 +174,6 @@ def http_request(method: str, url: str, headers=None, data=None, file=None, retr
     :param headers: Dictionary of custom headers to send.
     :param data: Data to send in the request body (conflicts with `file`).
     :param file: Path to a file to send as data in the request body (conflicts with `data`).
-    :param retry_on_400: Whether to retry on receiving HTTP status code 400.
     """
 
     purl = urllib3.util.parse_url(url)
@@ -234,22 +233,15 @@ def http_request(method: str, url: str, headers=None, data=None, file=None, retr
         else:
             retries_kwargs = {"method_whitelist": None}
 
-
-        status_forcelist = (
-            500,  # Internal Server Error
-            502,  # Bad Gateway
-            503,  # Service Unavailable
-            504,  # Gateway Timeout
-        )
-        if retry_on_400:
-            status_forcelist = (
-                400,  # Bad Request; retry on 400: service in progress
-            ) + status_forcelist
-
         pool_kwargs["retries"] = urllib3.Retry(
             total=int(conf.config["http_retries"]),
             backoff_factor=2,
-            status_forcelist=status_forcelist,
+            status_forcelist=(
+                500,  # Internal Server Error
+                502,  # Bad Gateway
+                503,  # Service Unavailable
+                504,  # Gateway Timeout
+            ),
             # don't raise because we want an actual response rather than a MaxRetryError with "too many <status_code> error responses" message
             raise_on_status=False,
             **retries_kwargs,
diff --git a/osc/core.py b/osc/core.py
index 2a5dff5c68..141de34897 100644
--- a/osc/core.py
+++ b/osc/core.py
@@ -5422,7 +5422,7 @@ def server_diff(
         query["file"] = UrlQueryArray(files)
 
     u = makeurl(apiurl, ['source', new_project, new_package], query=query)
-    f = http_POST(u, retry_on_400=False)
+    f = http_POST(u)
     if onlyissues and not xml:
         del_issue_list = []
         add_issue_list = []
diff --git a/osc/util/models.py b/osc/util/models.py
index 28b21ef171..0777b535d7 100644
--- a/osc/util/models.py
+++ b/osc/util/models.py
@@ -759,7 +759,7 @@ def xml_request(cls, method: str, apiurl: str, path: List[str], query: Optional[
         from ..core import makeurl
         url = makeurl(apiurl, path, query)
         # TODO: catch HTTPError and return the wrapped response as XmlModel instance
-        return http_request(method, url, data=data, retry_on_400=False)
+        return http_request(method, url, data=data)
 
     def do_update(self, other: "XmlModel") -> None:
         """