diff --git a/copy_namedpipes.go b/copy_namedpipes.go
index 615ddcd..657fb38 100644
--- a/copy_namedpipes.go
+++ b/copy_namedpipes.go
@@ -1,5 +1,4 @@
 //go:build !windows && !plan9 && !netbsd && !aix && !illumos && !solaris && !js
-// +build !windows,!plan9,!netbsd,!aix,!illumos,!solaris,!js
 
 package copy
 
diff --git a/copy_namedpipes_x.go b/copy_namedpipes_x.go
index 38dd9dc..da3d6f7 100644
--- a/copy_namedpipes_x.go
+++ b/copy_namedpipes_x.go
@@ -1,5 +1,4 @@
 //go:build windows || plan9 || netbsd || aix || illumos || solaris || js
-// +build windows plan9 netbsd aix illumos solaris js
 
 package copy
 
diff --git a/patherror_test.go b/patherror_test.go
index 40c03f6..86a4b06 100644
--- a/patherror_test.go
+++ b/patherror_test.go
@@ -1,3 +1,5 @@
+//go:build go1.16
+
 package copy
 
 import (
diff --git a/preserve_ltimes.go b/preserve_ltimes.go
index cc006d3..6b6787b 100644
--- a/preserve_ltimes.go
+++ b/preserve_ltimes.go
@@ -1,5 +1,4 @@
 //go:build !windows && !plan9 && !js
-// +build !windows,!plan9,!js
 
 package copy
 
diff --git a/preserve_ltimes_test.go b/preserve_ltimes_test.go
index 4289776..7d59bb9 100644
--- a/preserve_ltimes_test.go
+++ b/preserve_ltimes_test.go
@@ -1,5 +1,4 @@
 //go:build !windows && !plan9 && !js
-// +build !windows,!plan9,!js
 
 package copy
 
diff --git a/preserve_ltimes_x.go b/preserve_ltimes_x.go
index 02aec40..5ef234d 100644
--- a/preserve_ltimes_x.go
+++ b/preserve_ltimes_x.go
@@ -1,5 +1,4 @@
 //go:build windows || js || plan9
-// +build windows js plan9
 
 package copy
 
diff --git a/preserve_ltimes_x_test.go b/preserve_ltimes_x_test.go
index 1c73b5a..c34a2ec 100644
--- a/preserve_ltimes_x_test.go
+++ b/preserve_ltimes_x_test.go
@@ -1,5 +1,4 @@
 //go:build windows || js || plan9
-// +build windows js plan9
 
 package copy
 
diff --git a/preserve_owner.go b/preserve_owner.go
index ca71132..bd12964 100644
--- a/preserve_owner.go
+++ b/preserve_owner.go
@@ -1,5 +1,4 @@
 //go:build !windows && !plan9
-// +build !windows,!plan9
 
 package copy
 
diff --git a/preserve_owner_x.go b/preserve_owner_x.go
index d6a6148..1e8f125 100644
--- a/preserve_owner_x.go
+++ b/preserve_owner_x.go
@@ -1,5 +1,4 @@
 //go:build windows || plan9
-// +build windows plan9
 
 package copy
 
diff --git a/stat_times.go b/stat_times.go
index 75f45f6..49ea67c 100644
--- a/stat_times.go
+++ b/stat_times.go
@@ -1,5 +1,4 @@
 //go:build !windows && !darwin && !freebsd && !plan9 && !netbsd && !js
-// +build !windows,!darwin,!freebsd,!plan9,!netbsd,!js
 
 // TODO: add more runtimes
 
diff --git a/stat_times_darwin.go b/stat_times_darwin.go
index d4c23d8..935ce1d 100644
--- a/stat_times_darwin.go
+++ b/stat_times_darwin.go
@@ -1,5 +1,4 @@
 //go:build darwin
-// +build darwin
 
 package copy
 
diff --git a/stat_times_freebsd.go b/stat_times_freebsd.go
index 5309334..1deb1cc 100644
--- a/stat_times_freebsd.go
+++ b/stat_times_freebsd.go
@@ -1,5 +1,4 @@
 //go:build freebsd
-// +build freebsd
 
 package copy
 
diff --git a/stat_times_js.go b/stat_times_js.go
index c645771..a4b1e28 100644
--- a/stat_times_js.go
+++ b/stat_times_js.go
@@ -1,5 +1,4 @@
 //go:build js
-// +build js
 
 package copy
 
diff --git a/stat_times_windows.go b/stat_times_windows.go
index d6a84a7..babfe7d 100644
--- a/stat_times_windows.go
+++ b/stat_times_windows.go
@@ -1,5 +1,4 @@
 //go:build windows
-// +build windows
 
 package copy
 
diff --git a/stat_times_x.go b/stat_times_x.go
index 886ddd3..53da32e 100644
--- a/stat_times_x.go
+++ b/stat_times_x.go
@@ -1,5 +1,4 @@
 //go:build plan9 || netbsd
-// +build plan9 netbsd
 
 package copy
 
diff --git a/symlink_test.go b/symlink_test.go
index 9f464cd..8cad9bc 100644
--- a/symlink_test.go
+++ b/symlink_test.go
@@ -1,5 +1,4 @@
 //go:build !windows && !plan9 && !netbsd && !aix && !illumos && !solaris && !js
-// +build !windows,!plan9,!netbsd,!aix,!illumos,!solaris,!js
 
 package copy
 
diff --git a/symlink_test_x.go b/symlink_test_x.go
index 523f7f0..1f6bb1f 100644
--- a/symlink_test_x.go
+++ b/symlink_test_x.go
@@ -1,5 +1,4 @@
 //go:build windows || plan9 || netbsd || aix || illumos || solaris || js
-// +build windows plan9 netbsd aix illumos solaris js
 
 package copy
 
diff --git a/test/images/alpine.Dockerfile b/test/images/alpine.Dockerfile
index 854bd82..889b2ff 100644
--- a/test/images/alpine.Dockerfile
+++ b/test/images/alpine.Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.14
+FROM alpine:3.16
 
 WORKDIR /app
 
diff --git a/test_setup_test.go b/test_setup_test.go
index de18dc4..e9059ba 100644
--- a/test_setup_test.go
+++ b/test_setup_test.go
@@ -1,5 +1,4 @@
 //go:build !windows && !plan9 && !netbsd && !aix && !illumos && !solaris && !js
-// +build !windows,!plan9,!netbsd,!aix,!illumos,!solaris,!js
 
 package copy
 
diff --git a/test_setup_x_test.go b/test_setup_x_test.go
index 4c35b14..97ff6af 100644
--- a/test_setup_x_test.go
+++ b/test_setup_x_test.go
@@ -1,5 +1,4 @@
 //go:build windows || plan9 || netbsd || aix || illumos || solaris || js
-// +build windows plan9 netbsd aix illumos solaris js
 
 package copy