diff --git a/src/bin/initdb/t/001_initdb.pl b/src/bin/initdb/t/001_initdb.pl
index b31dad2464f..06a35ac0b73 100644
--- a/src/bin/initdb/t/001_initdb.pl
+++ b/src/bin/initdb/t/001_initdb.pl
@@ -98,7 +98,7 @@ else
 SKIP:
 {
 	skip "unix-style permissions not supported on Windows", 2
-	  if ($windows_os);
+	  if ($windows_os || $Config::Config{osname} eq 'cygwin');
 
 	# Init a new db with group access
 	my $datadir_group = "$tempdir/data_group";
diff --git a/src/bin/pg_basebackup/t/010_pg_basebackup.pl b/src/bin/pg_basebackup/t/010_pg_basebackup.pl
index 2d4b75a6fe5..489dde4adf1 100644
--- a/src/bin/pg_basebackup/t/010_pg_basebackup.pl
+++ b/src/bin/pg_basebackup/t/010_pg_basebackup.pl
@@ -483,7 +483,7 @@ SKIP:
 SKIP:
 {
 	skip "unix-style permissions not supported on Windows", 1
-	  if ($windows_os);
+	  if ($windows_os || $Config::Config{osname} eq 'cygwin');
 
 	ok(check_mode_recursive("$tempdir/backup1", 0750, 0640),
 		"check backup dir permissions");
diff --git a/src/bin/pg_ctl/t/001_start_stop.pl b/src/bin/pg_ctl/t/001_start_stop.pl
index cbdaee57fb1..6a5ef007433 100644
--- a/src/bin/pg_ctl/t/001_start_stop.pl
+++ b/src/bin/pg_ctl/t/001_start_stop.pl
@@ -79,7 +79,8 @@ $logFileName = "$tempdir/data/perm-test-640.log";
 
 SKIP:
 {
-	skip "group access not supported on Windows", 3 if ($windows_os);
+	skip "group access not supported on Windows", 3
+	  if ($windows_os || $Config::Config{osname} eq 'cygwin');
 
 	system_or_bail 'pg_ctl', 'stop', '-D', "$tempdir/data";
 
diff --git a/src/bin/pg_rewind/t/002_databases.pl b/src/bin/pg_rewind/t/002_databases.pl
index bbcd2047125..755ea80e332 100644
--- a/src/bin/pg_rewind/t/002_databases.pl
+++ b/src/bin/pg_rewind/t/002_databases.pl
@@ -60,7 +60,7 @@ template1
   SKIP:
 	{
 		skip "unix-style permissions not supported on Windows", 1
-		  if ($windows_os);
+		  if ($windows_os || $Config::Config{osname} eq 'cygwin');
 
 		ok(check_mode_recursive($node_primary->data_dir(), 0750, 0640),
 			'check PGDATA permissions');
diff --git a/src/bin/pg_verifybackup/t/003_corruption.pl b/src/bin/pg_verifybackup/t/003_corruption.pl
index f0b0f1f7e5b..fac823e9ce1 100644
--- a/src/bin/pg_verifybackup/t/003_corruption.pl
+++ b/src/bin/pg_verifybackup/t/003_corruption.pl
@@ -108,7 +108,8 @@ for my $scenario (@scenario)
   SKIP:
 	{
 		skip "unix-style permissions not supported on Windows", 4
-		  if $scenario->{'skip_on_windows'} && $windows_os;
+		  if ($scenario->{'skip_on_windows'} &&
+			  ($windows_os || $Config::Config{osname} eq 'cygwin'));
 
 		# Take a backup and check that it verifies OK.
 		my $backup_path = $primary->backup_dir . '/' . $name;