diff --git a/src/bin/pg_rewind/t/003_extrafiles.pl b/src/bin/pg_rewind/t/003_extrafiles.pl
index fd2bee5d20..d0840dcbe3 100644
--- a/src/bin/pg_rewind/t/003_extrafiles.pl
+++ b/src/bin/pg_rewind/t/003_extrafiles.pl
@@ -78,6 +78,19 @@ sub run_test
 		},
 		$test_primary_datadir);
 	@paths = sort @paths;
+
+	# File::Find converts backslashes to slashes in the newer Perl
+	# versions. To support all Perl versions, do the same conversion
+	# for Windows before comparing the paths.
+	if ($PostgreSQL::Test::Utils::windows_os)
+	{
+		for my $filename (@paths)
+		{
+			$filename =~ s{\\}{/}g;
+		}
+		$test_primary_datadir =~ s{\\}{/}g;
+	}
+
 	is_deeply(
 		\@paths,
 		[