diff --git a/gdb/testsuite/gdb.base/gdbhistsize-history.exp b/gdb/testsuite/gdb.base/gdbhistsize-history.exp
index 59fd2d0c143..00c3ea4dde2 100644
--- a/gdb/testsuite/gdb.base/gdbhistsize-history.exp
+++ b/gdb/testsuite/gdb.base/gdbhistsize-history.exp
@@ -35,6 +35,10 @@ proc test_histsize_history_setting { histsize size { env_var "GDBHISTSIZE" } } {
 	unset -nocomplain env(GDBHISTFILE)
 	unset -nocomplain env(GDBHISTSIZE)
 
+	# Ensure we don't accidentally pick up a .gdb_history from the
+	# testsuite directory.
+	set env(GDBHISTFILE) [standard_output_file .gdb_history]
+
 	set env($env_var) $histsize
 
 	with_test_prefix "histsize=$histsize" {