diff --git a/src/cmd/go/go_test.go b/src/cmd/go/go_test.go
index c58bc7408d0097..866241bf39dcf2 100644
--- a/src/cmd/go/go_test.go
+++ b/src/cmd/go/go_test.go
@@ -394,6 +394,7 @@ func (tg *testgoData) setenv(name, val string) {
 func (tg *testgoData) unsetenv(name string) {
 	if tg.env == nil {
 		tg.env = append([]string(nil), os.Environ()...)
+		tg.env = append(tg.env, "GO111MODULE=off")
 	}
 	for i, v := range tg.env {
 		if strings.HasPrefix(v, name+"=") {
diff --git a/src/cmd/go/testdata/script/binary_only.txt b/src/cmd/go/testdata/script/binary_only.txt
index 397904efaa8ab0..1842d8cea3e396 100644
--- a/src/cmd/go/testdata/script/binary_only.txt
+++ b/src/cmd/go/testdata/script/binary_only.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # check that error for missing binary-only says where it should be
 ! go build b
 stderr pkg[\\/].*a\.a
diff --git a/src/cmd/go/testdata/script/build_GOTMPDIR.txt b/src/cmd/go/testdata/script/build_GOTMPDIR.txt
index ea06dcc472def6..da54ced524214f 100644
--- a/src/cmd/go/testdata/script/build_GOTMPDIR.txt
+++ b/src/cmd/go/testdata/script/build_GOTMPDIR.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Set GOCACHE to a clean directory to ensure that 'go build' has work to report.
 env GOCACHE=$WORK/gocache
 
diff --git a/src/cmd/go/testdata/script/build_cache_compile.txt b/src/cmd/go/testdata/script/build_cache_compile.txt
index 7db881a2682d6f..04a6f9af1d0ee2 100644
--- a/src/cmd/go/testdata/script/build_cache_compile.txt
+++ b/src/cmd/go/testdata/script/build_cache_compile.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Set up fresh GOCACHE.
 env GOCACHE=$WORK/gocache
 mkdir $GOCACHE
diff --git a/src/cmd/go/testdata/script/build_cache_gomips.txt b/src/cmd/go/testdata/script/build_cache_gomips.txt
index c77acc3f2f32d1..3218354929f48c 100644
--- a/src/cmd/go/testdata/script/build_cache_gomips.txt
+++ b/src/cmd/go/testdata/script/build_cache_gomips.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Set up fresh GOCACHE.
 env GOCACHE=$WORK/gocache
 mkdir $GOCACHE
diff --git a/src/cmd/go/testdata/script/build_cache_link.txt b/src/cmd/go/testdata/script/build_cache_link.txt
index 61e7ee46d3a78d..658bb8849675c4 100644
--- a/src/cmd/go/testdata/script/build_cache_link.txt
+++ b/src/cmd/go/testdata/script/build_cache_link.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Set up fresh GOCACHE.
 env GOCACHE=$WORK/gocache
 mkdir $GOCACHE
diff --git a/src/cmd/go/testdata/script/build_cache_output.txt b/src/cmd/go/testdata/script/build_cache_output.txt
index ee4099e5f356cb..41c84ace7ad488 100644
--- a/src/cmd/go/testdata/script/build_cache_output.txt
+++ b/src/cmd/go/testdata/script/build_cache_output.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 [!gc] skip
 
 # Set up fresh GOCACHE.
diff --git a/src/cmd/go/testdata/script/build_nocache.txt b/src/cmd/go/testdata/script/build_nocache.txt
index 5aa46e0b77378e..46e95fa89d0e23 100644
--- a/src/cmd/go/testdata/script/build_nocache.txt
+++ b/src/cmd/go/testdata/script/build_nocache.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # As of Go 1.12, the module cache is required.
 
 # If none of the variables we use to locate GOCACHE are set, the cache is off
diff --git a/src/cmd/go/testdata/script/build_relative_pkgdir.txt b/src/cmd/go/testdata/script/build_relative_pkgdir.txt
index 76098a0662ba9b..0716bcd56a591e 100644
--- a/src/cmd/go/testdata/script/build_relative_pkgdir.txt
+++ b/src/cmd/go/testdata/script/build_relative_pkgdir.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Regression test for golang.org/issue/21309: accept relative -pkgdir argument.
 
 [short] skip
diff --git a/src/cmd/go/testdata/script/build_relative_tmpdir.txt b/src/cmd/go/testdata/script/build_relative_tmpdir.txt
index 9490a285d34fcd..3e98a67b813e11 100644
--- a/src/cmd/go/testdata/script/build_relative_tmpdir.txt
+++ b/src/cmd/go/testdata/script/build_relative_tmpdir.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # If GOTMPDIR is relative, 'go build' should derive an absolute $WORK directory.
 cd $WORK
 mkdir tmp
diff --git a/src/cmd/go/testdata/script/build_runtime_gcflags.txt b/src/cmd/go/testdata/script/build_runtime_gcflags.txt
index 767b768b82f874..5354a7393532c3 100644
--- a/src/cmd/go/testdata/script/build_runtime_gcflags.txt
+++ b/src/cmd/go/testdata/script/build_runtime_gcflags.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Set up fresh GOCACHE.
 env GOCACHE=$WORK/gocache
 mkdir $GOCACHE
diff --git a/src/cmd/go/testdata/script/cache_unix.txt b/src/cmd/go/testdata/script/cache_unix.txt
index f700ebe3ed2cfc..0e07ba63823e52 100644
--- a/src/cmd/go/testdata/script/cache_unix.txt
+++ b/src/cmd/go/testdata/script/cache_unix.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Integration test for cache directory calculation (cmd/go/internal/cache).
 
 [windows] skip
diff --git a/src/cmd/go/testdata/script/cgo_syso_issue29253.txt b/src/cmd/go/testdata/script/cgo_syso_issue29253.txt
index 0d18fa91d6b7fa..9825d1e3e98726 100644
--- a/src/cmd/go/testdata/script/cgo_syso_issue29253.txt
+++ b/src/cmd/go/testdata/script/cgo_syso_issue29253.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # This test tests that we can link in-package syso files that provides symbols
 # for cgo. See issue 29253.
 [!cgo] stop
diff --git a/src/cmd/go/testdata/script/clean_testcache.txt b/src/cmd/go/testdata/script/clean_testcache.txt
index a2d592deffdda5..5ac968b7d0a6fc 100644
--- a/src/cmd/go/testdata/script/clean_testcache.txt
+++ b/src/cmd/go/testdata/script/clean_testcache.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # go clean -testcache
 # should work (see golang.org/issue/29757).
 cd x
diff --git a/src/cmd/go/testdata/script/cover_atomic_pkgall.txt b/src/cmd/go/testdata/script/cover_atomic_pkgall.txt
index c122c05cb68930..c3bc67df534687 100644
--- a/src/cmd/go/testdata/script/cover_atomic_pkgall.txt
+++ b/src/cmd/go/testdata/script/cover_atomic_pkgall.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 [short] skip
 
 go test -coverpkg=all -covermode=atomic x
diff --git a/src/cmd/go/testdata/script/cover_pkgall_runtime.txt b/src/cmd/go/testdata/script/cover_pkgall_runtime.txt
index 5d169d631268e2..9927c3069070fd 100644
--- a/src/cmd/go/testdata/script/cover_pkgall_runtime.txt
+++ b/src/cmd/go/testdata/script/cover_pkgall_runtime.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Issue 23882
 
 [short] skip
diff --git a/src/cmd/go/testdata/script/cpu_profile_twice.txt b/src/cmd/go/testdata/script/cpu_profile_twice.txt
index 142d5ee718dceb..38d6439fb1717e 100644
--- a/src/cmd/go/testdata/script/cpu_profile_twice.txt
+++ b/src/cmd/go/testdata/script/cpu_profile_twice.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Issue 23150
 
 [short] skip
diff --git a/src/cmd/go/testdata/script/fileline.txt b/src/cmd/go/testdata/script/fileline.txt
index cdc3be2df8f12b..5cb35f0dac35f9 100644
--- a/src/cmd/go/testdata/script/fileline.txt
+++ b/src/cmd/go/testdata/script/fileline.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # look for short, relative file:line in error message
 ! go run ../../gopath/x/y/z/err.go
 stderr ^..[\\/]x[\\/]y[\\/]z[\\/]err.go:
diff --git a/src/cmd/go/testdata/script/gcflags_patterns.txt b/src/cmd/go/testdata/script/gcflags_patterns.txt
index 40f80b7d6e971e..f2e6e2b67da8c1 100644
--- a/src/cmd/go/testdata/script/gcflags_patterns.txt
+++ b/src/cmd/go/testdata/script/gcflags_patterns.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 [!gc] skip 'using -gcflags and -ldflags'
 
 # -gcflags=-e applies to named packages, not dependencies
diff --git a/src/cmd/go/testdata/script/get_brace.txt b/src/cmd/go/testdata/script/get_brace.txt
index be81d8f4875cc1..3449a0c2c82995 100644
--- a/src/cmd/go/testdata/script/get_brace.txt
+++ b/src/cmd/go/testdata/script/get_brace.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 [!exec:git] skip
 
 # Set up some empty repositories.
diff --git a/src/cmd/go/testdata/script/get_dotfiles.txt b/src/cmd/go/testdata/script/get_dotfiles.txt
index 1876114362690c..38a3fac612235c 100644
--- a/src/cmd/go/testdata/script/get_dotfiles.txt
+++ b/src/cmd/go/testdata/script/get_dotfiles.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 [!exec:git] skip
 
 # Set up a benign repository and a repository with a dotfile name.
diff --git a/src/cmd/go/testdata/script/get_tilde.txt b/src/cmd/go/testdata/script/get_tilde.txt
index 08289ca4054c02..6d18174acc3154 100644
--- a/src/cmd/go/testdata/script/get_tilde.txt
+++ b/src/cmd/go/testdata/script/get_tilde.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Paths containing windows short names should be rejected before attempting to fetch.
 ! go get example.com/longna~1.dir/thing
 stderr 'trailing tilde and digits'
diff --git a/src/cmd/go/testdata/script/get_unicode.txt b/src/cmd/go/testdata/script/get_unicode.txt
index 31edcdb9f66c98..ab1b914f50659a 100644
--- a/src/cmd/go/testdata/script/get_unicode.txt
+++ b/src/cmd/go/testdata/script/get_unicode.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 [!exec:git] skip
 
 # Construct a repository that imports a non-ASCII path.
diff --git a/src/cmd/go/testdata/script/get_with_git_trace.txt b/src/cmd/go/testdata/script/get_with_git_trace.txt
index 93341a302c86cf..98854c72ad262b 100644
--- a/src/cmd/go/testdata/script/get_with_git_trace.txt
+++ b/src/cmd/go/testdata/script/get_with_git_trace.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 env GIT_TRACE=1
 
 [!net] skip
diff --git a/src/cmd/go/testdata/script/goflags.txt b/src/cmd/go/testdata/script/goflags.txt
index 20de325ac286b7..fac6d807202285 100644
--- a/src/cmd/go/testdata/script/goflags.txt
+++ b/src/cmd/go/testdata/script/goflags.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # GOFLAGS sets flags for commands
 
 env GOFLAGS='-e -f={{.Dir}} --test.benchtime=1s -count=10'
diff --git a/src/cmd/go/testdata/script/help.txt b/src/cmd/go/testdata/script/help.txt
index 9f455256f72d88..e6cbc829281cbd 100644
--- a/src/cmd/go/testdata/script/help.txt
+++ b/src/cmd/go/testdata/script/help.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # go help shows overview.
 go help
 stdout 'Go is a tool'
diff --git a/src/cmd/go/testdata/script/install_cleans_build.txt b/src/cmd/go/testdata/script/install_cleans_build.txt
index b8d322de629899..7f1b9174397b18 100644
--- a/src/cmd/go/testdata/script/install_cleans_build.txt
+++ b/src/cmd/go/testdata/script/install_cleans_build.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # 'go install' with no arguments should clean up after go build
 cd mycmd
 go build
diff --git a/src/cmd/go/testdata/script/install_cross_gobin.txt b/src/cmd/go/testdata/script/install_cross_gobin.txt
index 587081f1355a6a..d9ab35c2e16c82 100644
--- a/src/cmd/go/testdata/script/install_cross_gobin.txt
+++ b/src/cmd/go/testdata/script/install_cross_gobin.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 cd mycmd
 go build mycmd
 
diff --git a/src/cmd/go/testdata/script/install_rebuild_gopath.txt b/src/cmd/go/testdata/script/install_rebuild_gopath.txt
index d42b07004bf628..14a6c8611e32d5 100644
--- a/src/cmd/go/testdata/script/install_rebuild_gopath.txt
+++ b/src/cmd/go/testdata/script/install_rebuild_gopath.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # GOPATH with p1 in d1, p2 in d2
 env GOPATH=$WORK/d1${:}$WORK/d2
 
diff --git a/src/cmd/go/testdata/script/install_rebuild_removed.txt b/src/cmd/go/testdata/script/install_rebuild_removed.txt
index e7620a08caebee..5db3778d8eb8b9 100644
--- a/src/cmd/go/testdata/script/install_rebuild_removed.txt
+++ b/src/cmd/go/testdata/script/install_rebuild_removed.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # go command should detect package staleness as source file set changes
 go install mypkg
 ! stale mypkg
diff --git a/src/cmd/go/testdata/script/linkname.txt b/src/cmd/go/testdata/script/linkname.txt
index e2ec00c6edc3d8..11336594d3596b 100644
--- a/src/cmd/go/testdata/script/linkname.txt
+++ b/src/cmd/go/testdata/script/linkname.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # check for linker name in error message about linker crash
 [!gc] skip
 ! go build -ldflags=-crash_for_testing x.go
diff --git a/src/cmd/go/testdata/script/list_bad_import.txt b/src/cmd/go/testdata/script/list_bad_import.txt
index 3d9cac0d5f5495..958c576c53c54b 100644
--- a/src/cmd/go/testdata/script/list_bad_import.txt
+++ b/src/cmd/go/testdata/script/list_bad_import.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # This test matches mod_list_bad_import, but in GOPATH mode.
 # Please keep them in sync.
 
diff --git a/src/cmd/go/testdata/script/list_compiled_imports.txt b/src/cmd/go/testdata/script/list_compiled_imports.txt
index e6f5abb6af129a..7780b074c10532 100644
--- a/src/cmd/go/testdata/script/list_compiled_imports.txt
+++ b/src/cmd/go/testdata/script/list_compiled_imports.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 [!cgo] skip
 
 # go list should report import "C"
diff --git a/src/cmd/go/testdata/script/list_find.txt b/src/cmd/go/testdata/script/list_find.txt
index 63c6896e507dbb..aaac6585dd55f9 100644
--- a/src/cmd/go/testdata/script/list_find.txt
+++ b/src/cmd/go/testdata/script/list_find.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # go list -find should not report imports
 
 go list -f {{.Incomplete}} x/y/z...  # should probably exit non-zero but never has
diff --git a/src/cmd/go/testdata/script/list_importmap.txt b/src/cmd/go/testdata/script/list_importmap.txt
index a42dc47f2443bc..52ee6028f5bd2a 100644
--- a/src/cmd/go/testdata/script/list_importmap.txt
+++ b/src/cmd/go/testdata/script/list_importmap.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # gccgo does not have standard packages.
 [gccgo] skip
 
diff --git a/src/cmd/go/testdata/script/list_std.txt b/src/cmd/go/testdata/script/list_std.txt
index 046bec6ac54b05..88a659f74332de 100644
--- a/src/cmd/go/testdata/script/list_std.txt
+++ b/src/cmd/go/testdata/script/list_std.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 [!gc] skip
 
 # listing GOROOT should only find standard packages
diff --git a/src/cmd/go/testdata/script/list_tags.txt b/src/cmd/go/testdata/script/list_tags.txt
index c5dc99e9fbad3d..49069bd2135eae 100644
--- a/src/cmd/go/testdata/script/list_tags.txt
+++ b/src/cmd/go/testdata/script/list_tags.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # go list supports -tags
 go list -tags=thetag ./my...
 stdout mypkg
diff --git a/src/cmd/go/testdata/script/list_test_e.txt b/src/cmd/go/testdata/script/list_test_e.txt
index f1473322c65fba..4e36b88e859ae5 100644
--- a/src/cmd/go/testdata/script/list_test_e.txt
+++ b/src/cmd/go/testdata/script/list_test_e.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # issue 25980: crash in go list -e -test
 go list -e -test -f '{{.Error}}' p
 stdout '^p[/\\]d_test.go:2:8: cannot find package "d" in any of:'
diff --git a/src/cmd/go/testdata/script/list_test_imports.txt b/src/cmd/go/testdata/script/list_test_imports.txt
index 51d1ce9a69642e..b2a6bc45f9ef0f 100644
--- a/src/cmd/go/testdata/script/list_test_imports.txt
+++ b/src/cmd/go/testdata/script/list_test_imports.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # issue 26880: list with tests has wrong variant in imports
 go list -test -f '{{.ImportPath}}:{{with .Imports}} {{join . ", "}}{{end}}' a b
 cmp stdout imports.txt
diff --git a/src/cmd/go/testdata/script/mod_find.txt b/src/cmd/go/testdata/script/mod_find.txt
index eb7f974b3b7bbc..703a88e99c9a83 100644
--- a/src/cmd/go/testdata/script/mod_find.txt
+++ b/src/cmd/go/testdata/script/mod_find.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=auto
+
 # Derive module path from import comment.
 cd $WORK/x
 exists x.go
diff --git a/src/cmd/go/testdata/script/mod_gobuild_import.txt b/src/cmd/go/testdata/script/mod_gobuild_import.txt
index 932b8b66f92fe5..d2d1645b838edd 100644
--- a/src/cmd/go/testdata/script/mod_gobuild_import.txt
+++ b/src/cmd/go/testdata/script/mod_gobuild_import.txt
@@ -7,14 +7,12 @@ env GO111MODULE=off
 ! exec $WORK/testimport.exe x/y/z/w .
 
 # GO111MODULE=auto in GOPATH/src
-env GO111MODULE=
-! exec $WORK/testimport.exe x/y/z/w .
 env GO111MODULE=auto
 ! exec $WORK/testimport.exe x/y/z/w .
 
 # GO111MODULE=auto outside GOPATH/src
 cd $GOPATH/other
-env GO111MODULE=
+env GO111MODULE=auto
 exec $WORK/testimport.exe other/x/y/z/w .
 stdout w2.go
 
@@ -22,7 +20,6 @@ stdout w2.go
 stderr 'cannot find module providing package x/y/z/w'
 
 cd z
-env GO111MODULE=auto
 exec $WORK/testimport.exe other/x/y/z/w .
 stdout w2.go
 
@@ -33,6 +30,7 @@ stdout w2.go
 
 # GO111MODULE=on in GOPATH/src
 cd $GOPATH/src
+env GO111MODULE=on
 exec $WORK/testimport.exe x/y/z/w .
 stdout w1.go
 cd w
diff --git a/src/cmd/go/testdata/script/pattern_syntax_error.txt b/src/cmd/go/testdata/script/pattern_syntax_error.txt
index 8e6549b5c54e1d..9a1f5e52f07a16 100644
--- a/src/cmd/go/testdata/script/pattern_syntax_error.txt
+++ b/src/cmd/go/testdata/script/pattern_syntax_error.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # patterns match directories with syntax errors
 ! go list ./...
 ! go build ./...
diff --git a/src/cmd/go/testdata/script/run_hello.txt b/src/cmd/go/testdata/script/run_hello.txt
index 8c4c1c16833e97..939b661e58f378 100644
--- a/src/cmd/go/testdata/script/run_hello.txt
+++ b/src/cmd/go/testdata/script/run_hello.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # hello world
 go run hello.go
 stderr 'hello world'
diff --git a/src/cmd/go/testdata/script/run_wildcard.txt b/src/cmd/go/testdata/script/run_wildcard.txt
index cd401e00e6441f..72036d1d8dbdc7 100644
--- a/src/cmd/go/testdata/script/run_wildcard.txt
+++ b/src/cmd/go/testdata/script/run_wildcard.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Fix for https://github.com/golang/go/issues/28696:
 # go run x/... should not panic when directory x doesn't exist.
 
diff --git a/src/cmd/go/testdata/script/script_wait.txt b/src/cmd/go/testdata/script/script_wait.txt
index 0770b39523d5f6..3cd4ded9dd111a 100644
--- a/src/cmd/go/testdata/script/script_wait.txt
+++ b/src/cmd/go/testdata/script/script_wait.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 [!exec:echo] skip
 [!exec:false] skip
 
diff --git a/src/cmd/go/testdata/script/test_badtest.txt b/src/cmd/go/testdata/script/test_badtest.txt
index 42fcfed2fcc53a..f5db6941a0d129 100644
--- a/src/cmd/go/testdata/script/test_badtest.txt
+++ b/src/cmd/go/testdata/script/test_badtest.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 ! go test badtest/...
 ! stdout ^ok
 stdout ^FAIL\tbadtest/badexec
diff --git a/src/cmd/go/testdata/script/test_compile_binary.txt b/src/cmd/go/testdata/script/test_compile_binary.txt
index 6c01bc5729e913..6562f2453ff410 100644
--- a/src/cmd/go/testdata/script/test_compile_binary.txt
+++ b/src/cmd/go/testdata/script/test_compile_binary.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 ! go test -c compile_binary/...
 stderr 'build comment'
 
diff --git a/src/cmd/go/testdata/script/test_devnull.txt b/src/cmd/go/testdata/script/test_devnull.txt
index c414e59ba3a9c7..e7ebda33ee5b0b 100644
--- a/src/cmd/go/testdata/script/test_devnull.txt
+++ b/src/cmd/go/testdata/script/test_devnull.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # go test -c -o NUL
 # should work (see golang.org/issue/28035).
 cd x
diff --git a/src/cmd/go/testdata/script/vendor_complex.txt b/src/cmd/go/testdata/script/vendor_complex.txt
index 6513451df856c4..9ca94e72c52749 100644
--- a/src/cmd/go/testdata/script/vendor_complex.txt
+++ b/src/cmd/go/testdata/script/vendor_complex.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # smoke test for complex build configuration
 go build -o complex.exe complex
 [exec:gccgo] go build -compiler=gccgo -o complex.exe complex
diff --git a/src/cmd/go/testdata/script/vet_asm.txt b/src/cmd/go/testdata/script/vet_asm.txt
index 807e2b76f58999..ea920ea866c50e 100644
--- a/src/cmd/go/testdata/script/vet_asm.txt
+++ b/src/cmd/go/testdata/script/vet_asm.txt
@@ -1,3 +1,5 @@
+env GO111MODULE=off
+
 # Issue 27665. Verify that "go vet" analyzes non-Go files.
 
 env GOOS=linux