diff --git a/src/cmd/cover/cover_test.go b/src/cmd/cover/cover_test.go
index f002442b63..cf8f3d2384 100644
--- a/src/cmd/cover/cover_test.go
+++ b/src/cmd/cover/cover_test.go
@@ -82,6 +82,7 @@ func TestMain(m *testing.M) {
 		fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
 	}
+	os.Setenv("GOPATH", filepath.Join(dir, "_gopath"))
 
 	testTempDir = dir
 
diff --git a/src/cmd/internal/obj/x86/issue19518_test.go b/src/cmd/internal/obj/x86/issue19518_test.go
index 1b0fb4a8b1..174e2dd846 100644
--- a/src/cmd/internal/obj/x86/issue19518_test.go
+++ b/src/cmd/internal/obj/x86/issue19518_test.go
@@ -64,7 +64,8 @@ func objdumpOutput(t *testing.T) []byte {
 		testenv.GoToolPath(t), "build", "-o",
 		filepath.Join(tmpdir, "output"))
 
-	cmd.Env = append(os.Environ(), "GOARCH=amd64", "GOOS=linux")
+	cmd.Env = append(os.Environ(),
+		"GOARCH=amd64", "GOOS=linux", "GOPATH="+filepath.Join(tmpdir, "_gopath"))
 	cmd.Dir = tmpdir
 
 	out, err := cmd.CombinedOutput()
diff --git a/src/cmd/internal/obj/x86/obj6_test.go b/src/cmd/internal/obj/x86/obj6_test.go
index c5399744f2..f9dd584569 100644
--- a/src/cmd/internal/obj/x86/obj6_test.go
+++ b/src/cmd/internal/obj/x86/obj6_test.go
@@ -99,7 +99,8 @@ func asmOutput(t *testing.T, s string) []byte {
 		testenv.GoToolPath(t), "tool", "asm", "-S", "-dynlink",
 		"-o", filepath.Join(tmpdir, "output.6"), tmpfile.Name())
 
-	cmd.Env = append(os.Environ(), "GOARCH=amd64", "GOOS=linux")
+	cmd.Env = append(os.Environ(),
+		"GOARCH=amd64", "GOOS=linux", "GOPATH="+filepath.Join(tmpdir, "_gopath"))
 	asmout, err := cmd.CombinedOutput()
 	if err != nil {
 		t.Fatalf("error %s output %s", err, asmout)
diff --git a/src/cmd/link/link_test.go b/src/cmd/link/link_test.go
index 5200c3a6f0..bcb3f2f58b 100644
--- a/src/cmd/link/link_test.go
+++ b/src/cmd/link/link_test.go
@@ -161,7 +161,8 @@ TEXT ·x(SB),0,$0
 `)
 	cmd := exec.Command(testenv.GoToolPath(t), "build")
 	cmd.Dir = tmpdir
-	cmd.Env = append(os.Environ(), []string{"GOARCH=amd64", "GOOS=linux"}...)
+	cmd.Env = append(os.Environ(),
+		"GOARCH=amd64", "GOOS=linux", "GOPATH="+filepath.Join(tmpdir, "_gopath"))
 	out, err := cmd.CombinedOutput()
 	if err == nil {
 		t.Fatalf("expected build to fail, but it succeeded")