diff --git a/src/bin/pg_checksums/t/002_actions.pl b/src/bin/pg_checksums/t/002_actions.pl
index 97492caab4..2cc8b68c75 100644
--- a/src/bin/pg_checksums/t/002_actions.pl
+++ b/src/bin/pg_checksums/t/002_actions.pl
@@ -6,7 +6,6 @@
 
 use strict;
 use warnings;
-use Config;
 use PostgresNode;
 use TestLib;
 
@@ -182,18 +181,13 @@ command_fails(
 # Test postgres -C for an offline cluster.
 # Run-time GUCs are safe to query here.  Note that a lock file is created,
 # then unlinked, leading to an extra LOG entry showing in stderr.
-SKIP:
-{
-	skip "unstable output generated with Msys", 3
-	  if ($Config{osname} eq 'msys');
-	command_checks_all(
-		[ 'postgres', '-D', $pgdata, '-C', 'data_checksums' ],
-		0,
-		[qr/^on$/],
-		# LOG entry when unlinking lock file.
-		[qr/database system is shut down/],
-		'data_checksums=on is reported on an offline cluster');
-}
+command_checks_all(
+	[ 'postgres', '-D', $pgdata, '-C', 'data_checksums' ],
+	0,
+	[qr/^on$/],
+	# LOG entry when unlinking lock file.
+	[qr/database system is shut down/],
+	'data_checksums=on is reported on an offline cluster');
 
 # Checks cannot happen with an online cluster
 $node->start;
diff --git a/src/test/perl/TestLib.pm b/src/test/perl/TestLib.pm
index cbab1587cc..15f4e6f56e 100644
--- a/src/test/perl/TestLib.pm
+++ b/src/test/perl/TestLib.pm
@@ -434,6 +434,7 @@ sub run_command
 	my ($cmd) = @_;
 	my ($stdout, $stderr);
 	my $result = IPC::Run::run $cmd, '>', \$stdout, '2>', \$stderr;
+	foreach ($stderr, $stdout) { s/\r\n/\n/g if $Config{osname} eq 'msys'; }
 	chomp($stdout);
 	chomp($stderr);
 	return ($stdout, $stderr);
@@ -878,6 +879,7 @@ sub command_like
 	my $result = IPC::Run::run $cmd, '>', \$stdout, '2>', \$stderr;
 	ok($result, "$test_name: exit code 0");
 	is($stderr, '', "$test_name: no stderr");
+	$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 	like($stdout, $expected_stdout, "$test_name: matches");
 	return;
 }
@@ -930,6 +932,7 @@ sub command_fails_like
 	print("# Running: " . join(" ", @{$cmd}) . "\n");
 	my $result = IPC::Run::run $cmd, '>', \$stdout, '2>', \$stderr;
 	ok(!$result, "$test_name: exit code not 0");
+	$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 	like($stderr, $expected_stderr, "$test_name: matches");
 	return;
 }
@@ -974,6 +977,8 @@ sub command_checks_all
 	  if $ret & 127;
 	$ret = $ret >> 8;
 
+	foreach ($stderr, $stdout) { s/\r\n/\n/g if $Config{osname} eq 'msys'; }
+
 	# check status
 	ok($ret == $expected_ret,
 		"$test_name status (got $ret vs expected $expected_ret)");