diff --git a/src/bin/pg_ctl/t/001_start_stop.pl b/src/bin/pg_ctl/t/001_start_stop.pl
index 4bfc23b93de..d656a7fe183 100644
--- a/src/bin/pg_ctl/t/001_start_stop.pl
+++ b/src/bin/pg_ctl/t/001_start_stop.pl
@@ -46,16 +46,7 @@ my $ctlcmd = [
 	'pg_ctl', 'start', '-D', "$tempdir/data", '-l',
 	"$TestLib::log_path/001_start_stop_server.log"
 ];
-if ($Config{osname} ne 'msys')
-{
-	command_like($ctlcmd, qr/done.*server started/s, 'pg_ctl start');
-}
-else
-{
-
-	# use the version of command_like that doesn't hang on Msys here
-	command_like_safe($ctlcmd, qr/done.*server started/s, 'pg_ctl start');
-}
+command_like($ctlcmd, qr/done.*server started/s, 'pg_ctl start');
 
 # sleep here is because Windows builds can't check postmaster.pid exactly,
 # so they may mistake a pre-existing postmaster.pid for one created by the
diff --git a/src/bin/pg_rewind/t/RewindTest.pm b/src/bin/pg_rewind/t/RewindTest.pm
index 938c661afc2..356c9ba0539 100644
--- a/src/bin/pg_rewind/t/RewindTest.pm
+++ b/src/bin/pg_rewind/t/RewindTest.pm
@@ -115,7 +115,6 @@ sub check_query
 	}
 	else
 	{
-		$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		is($stdout, $expected_stdout, "$test_name: query result matches");
 	}
 	return;
diff --git a/src/test/perl/PostgresNode.pm b/src/test/perl/PostgresNode.pm
index 40ba59f3864..50acc169024 100644
--- a/src/test/perl/PostgresNode.pm
+++ b/src/test/perl/PostgresNode.pm
@@ -846,9 +846,7 @@ sub kill9
 	local %ENV = $self->_get_env();
 
 	print "### Killing node \"$name\" using signal 9\n";
-	# kill(9, ...) fails under msys Perl 5.8.8, so fall back on pg_ctl.
-	kill(9, $self->{_pid})
-	  or TestLib::system_or_bail('pg_ctl', 'kill', 'KILL', $self->{_pid});
+	kill(9, $self->{_pid});
 	$self->{_pid} = undef;
 	return;
 }
@@ -1772,19 +1770,13 @@ sub psql
 		}
 	};
 
-	# Note: on Windows, IPC::Run seems to convert \r\n to \n in program output
-	# if we're using native Perl, but not if we're using MSys Perl.  So do it
-	# by hand in the latter case, here and elsewhere.
-
 	if (defined $$stdout)
 	{
-		$$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp $$stdout;
 	}
 
 	if (defined $$stderr)
 	{
-		$$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp $$stderr;
 	}
 
@@ -2261,9 +2253,7 @@ sub poll_query_until
 		my $result = IPC::Run::run $cmd, '<', \$query,
 		  '>', \$stdout, '2>', \$stderr;
 
-		$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp($stdout);
-		$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp($stderr);
 
 		if ($stdout eq $expected && $stderr eq '')
@@ -2717,9 +2707,6 @@ sub pg_recvlogical_upto
 		}
 	};
 
-	$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
-	$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
-
 	if (wantarray)
 	{
 		return ($ret, $stdout, $stderr, $timeout);
diff --git a/src/test/perl/TestLib.pm b/src/test/perl/TestLib.pm
index 7217b009e4b..c0fcf7dc664 100644
--- a/src/test/perl/TestLib.pm
+++ b/src/test/perl/TestLib.pm
@@ -382,7 +382,6 @@ sub run_command
 	my ($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);
@@ -467,7 +466,6 @@ sub slurp_file
 	$contents = <$fh>;
 	close $fh;
 
-	$contents =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 	return $contents;
 }
 
@@ -825,7 +823,6 @@ 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;
 }
@@ -878,7 +875,6 @@ 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;
 }
@@ -923,8 +919,6 @@ 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)");
diff --git a/src/test/recovery/t/021_row_visibility.pl b/src/test/recovery/t/021_row_visibility.pl
index fcff0a2feba..fd2c0a30531 100644
--- a/src/test/recovery/t/021_row_visibility.pl
+++ b/src/test/recovery/t/021_row_visibility.pl
@@ -187,9 +187,6 @@ sub send_query_and_wait
 	$$psql{run}->pump_nb();
 	while (1)
 	{
-		# See PostgresNode.pm's psql()
-		$$psql{stdout} =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
-
 		last if $$psql{stdout} =~ /$untl/;
 
 		if ($psql_timeout->is_expired)
diff --git a/src/test/recovery/t/cp_history_files b/src/test/recovery/t/cp_history_files
index 66f1b598fea..cfeea41e5b9 100644
--- a/src/test/recovery/t/cp_history_files
+++ b/src/test/recovery/t/cp_history_files
@@ -7,11 +7,4 @@ use warnings;
 die "wrong number of arguments" if @ARGV != 2;
 my ($source, $target) = @ARGV;
 exit if $source !~ /history/;
-if ($^O eq 'msys')
-{
-    # make a windows path look like an msys path if necessary
-    $source =~ s!^([A-Za-z]):!'/' . lc($1)!e;
-    $source =~ s!\\!/!g;
-}
-
 copy($source, $target) or die "couldn't copy $source to $target: $!";