diff --git a/internal/lsp/cache/snapshot.go b/internal/lsp/cache/snapshot.go
index edcb5213e5..1dd3339e8e 100644
--- a/internal/lsp/cache/snapshot.go
+++ b/internal/lsp/cache/snapshot.go
@@ -391,14 +391,13 @@ func (s *snapshot) goCommandInvocation(ctx context.Context, flags source.Invocat
 			} else {
 				inv.ModFlag = mutableModFlag
 			}
-		case source.UpdateUserModFile, source.WriteTemporaryModFile:
+		case source.WriteTemporaryModFile:
 			inv.ModFlag = mutableModFlag
 		}
 	}
 
-	wantTempMod := mode != source.UpdateUserModFile
 	needTempMod := mode == source.WriteTemporaryModFile
-	tempMod := wantTempMod && s.workspaceMode()&tempModfile != 0
+	tempMod := s.workspaceMode()&tempModfile != 0
 	if needTempMod && !tempMod {
 		return "", nil, cleanup, source.ErrTmpModfileUnsupported
 	}
diff --git a/internal/lsp/source/view.go b/internal/lsp/source/view.go
index 906d45fc0e..e7120ec5af 100644
--- a/internal/lsp/source/view.go
+++ b/internal/lsp/source/view.go
@@ -201,9 +201,6 @@ const (
 	// Normal is appropriate for commands that might be run by a user and don't
 	// deliberately modify go.mod files, e.g. `go test`.
 	Normal InvocationFlags = iota
-	// UpdateUserModFile is for commands that intend to update the user's real
-	// go.mod file, e.g. `go mod tidy` in response to a user's request to tidy.
-	UpdateUserModFile
 	// WriteTemporaryModFile is for commands that need information from a
 	// modified version of the user's go.mod file, e.g. `go mod tidy` used to
 	// generate diagnostics.