diff --git a/internal/os/execpath/lp_js.go b/internal/os/execpath/lp_js.go
index e826c319..a0571b71 100644
--- a/internal/os/execpath/lp_js.go
+++ b/internal/os/execpath/lp_js.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build js && wasm
-// +build js,wasm
 
 package execpath
 
diff --git a/internal/os/execpath/lp_unix.go b/internal/os/execpath/lp_unix.go
index cb8e9760..37f18c79 100644
--- a/internal/os/execpath/lp_unix.go
+++ b/internal/os/execpath/lp_unix.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build aix || darwin || dragonfly || freebsd || linux || nacl || netbsd || openbsd || solaris
-// +build aix darwin dragonfly freebsd linux nacl netbsd openbsd solaris
 
 package execpath
 
diff --git a/testenv/testenv_cgo.go b/testenv/testenv_cgo.go
index 02f08f57..7426a29c 100644
--- a/testenv/testenv_cgo.go
+++ b/testenv/testenv_cgo.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build cgo
-// +build cgo
 
 package testenv
 
diff --git a/testenv/testenv_notwin.go b/testenv/testenv_notwin.go
index a1ae92c0..1484058f 100644
--- a/testenv/testenv_notwin.go
+++ b/testenv/testenv_notwin.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !windows
-// +build !windows
 
 package testenv
 
diff --git a/testscript/clonefile.go b/testscript/clonefile.go
index c841d67d..be49a2c8 100644
--- a/testscript/clonefile.go
+++ b/testscript/clonefile.go
@@ -1,5 +1,4 @@
 //go:build unix && !darwin
-// +build unix,!darwin
 
 package testscript
 
diff --git a/testscript/clonefile_other.go b/testscript/clonefile_other.go
index d66b841b..1748cafe 100644
--- a/testscript/clonefile_other.go
+++ b/testscript/clonefile_other.go
@@ -1,5 +1,4 @@
 //go:build !unix
-// +build !unix
 
 package testscript
 
diff --git a/testscript/envvarname.go b/testscript/envvarname.go
index 15e41f2b..2cc94fce 100644
--- a/testscript/envvarname.go
+++ b/testscript/envvarname.go
@@ -1,5 +1,4 @@
 //go:build !windows
-// +build !windows
 
 package testscript