diff --git a/internal/api/client/statuses/statuscreate_test.go b/internal/api/client/statuses/statuscreate_test.go
index 227e7d83e..8af55da10 100644
--- a/internal/api/client/statuses/statuscreate_test.go
+++ b/internal/api/client/statuses/statuscreate_test.go
@@ -368,7 +368,7 @@ func (suite *StatusCreateTestSuite) TestPostNewStatusMessedUpIntPolicy() {
 }`, out)
 }
 
-func (suite *StatusCreateTestSuite) TestPostNewScheduledStatus() {
+func (suite *StatusCreateTestSuite) TestPostNewFutureScheduledStatus() {
 	out, recorder := suite.postStatus(map[string][]string{
 		"status":       {"this is a brand new status! #helloworld"},
 		"spoiler_text": {"hello hello"},
@@ -383,7 +383,7 @@ func (suite *StatusCreateTestSuite) TestPostNewScheduledStatus() {
 
 	// We should have a helpful error message.
 	suite.Equal(`{
-  "error": "Not Implemented: scheduled_at is not yet implemented"
+  "error": "Not Implemented: scheduled statuses are not yet supported"
 }`, out)
 }
 
diff --git a/internal/processing/status/create.go b/internal/processing/status/create.go
index 110375119..0e0a851bc 100644
--- a/internal/processing/status/create.go
+++ b/internal/processing/status/create.go
@@ -107,7 +107,7 @@ func (p *Processor) Create(
 		if now.Before(scheduledAt) {
 			const errText = "scheduled statuses are not yet supported"
 			err := gtserror.New(errText)
-			return nil, gtserror.NewErrorBadRequest(err, errText)
+			return nil, gtserror.NewErrorNotImplemented(err, errText)
 		}
 
 		// If not scheduled into the future, this status is being backfilled.
@@ -168,7 +168,7 @@ func (p *Processor) Create(
 			if mention.TargetAccountID != requester.ID {
 				const errText = "statuses mentioning others can't be backfilled"
 				err := gtserror.New(errText)
-				return nil, gtserror.NewErrorBadRequest(err, errText)
+				return nil, gtserror.NewErrorForbidden(err, errText)
 			}
 		}
 	}
@@ -208,7 +208,7 @@ func (p *Processor) Create(
 		if backfill {
 			const errText = "statuses with polls can't be backfilled"
 			err := gtserror.New(errText)
-			return nil, gtserror.NewErrorBadRequest(err, errText)
+			return nil, gtserror.NewErrorForbidden(err, errText)
 		}
 
 		// Process poll, inserting into database.
@@ -356,7 +356,7 @@ func (p *Processor) processInReplyTo(
 	if backfill && requester.ID != inReplyTo.AccountID {
 		const errText = "replies to others can't be backfilled"
 		err := gtserror.New(errText)
-		return gtserror.NewErrorBadRequest(err, errText)
+		return gtserror.NewErrorForbidden(err, errText)
 	}
 
 	// Derive pendingApproval status.