diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8611e8b..1f73049 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.16.x, 1.17.x]
+        go-version: [1.17.x]
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps:
diff --git a/README.md b/README.md
index 72395bf..2ed3fed 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 	go install mvdan.cc/garble@latest
 
-Obfuscate Go code by wrapping the Go toolchain. Requires Go 1.16 or later.
+Obfuscate Go code by wrapping the Go toolchain. Requires Go 1.17 or later.
 
 	garble build [build flags] [packages]
 
@@ -41,12 +41,12 @@ what packages to obfuscate, set `GOPRIVATE`, documented at `go help private`.
 Note that commands like `garble build` will use the `go` version found in your
 `$PATH`. To use different versions of Go, you can
 [install them](https://golang.org/doc/manage-install#installing-multiple)
-and set up `$PATH` with them. For example, for Go 1.16.1:
+and set up `$PATH` with them. For example, for Go 1.17.1:
 
 ```sh
-$ go install golang.org/dl/go1.16.1@latest
-$ go1.16.1 download
-$ PATH=$(go1.16.1 env GOROOT)/bin:${PATH} garble build
+$ go install golang.org/dl/go1.17.1@latest
+$ go1.17.1 download
+$ PATH=$(go1.17.1 env GOROOT)/bin:${PATH} garble build
 ```
 
 ### Literal obfuscation
diff --git a/go.mod b/go.mod
index feed7db..f89d920 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module mvdan.cc/garble
 
-go 1.16
+go 1.17
 
 require (
 	github.com/google/go-cmp v0.5.6
@@ -8,3 +8,9 @@ require (
 	golang.org/x/mod v0.5.0
 	golang.org/x/tools v0.1.5
 )
+
+require (
+	github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	gopkg.in/errgo.v2 v2.1.0 // indirect
+)
diff --git a/main.go b/main.go
index 6ae9c95..00940c1 100644
--- a/main.go
+++ b/main.go
@@ -23,11 +23,11 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"regexp"
 	"runtime"
 	"runtime/debug"
 	"strconv"
 	"strings"
-	"time"
 	"unicode"
 	"unicode/utf8"
 
@@ -248,15 +248,12 @@ func (e errJustExit) Error() string { return fmt.Sprintf("exit: %d", e) }
 
 func goVersionOK() bool {
 	const (
-		minGoVersionSemver = "v1.16.0"
-		suggestedGoVersion = "1.16.x"
-
-		gitTimeFormat = "Mon Jan 2 15:04:05 2006 -0700"
+		minGoVersionSemver = "v1.17.0"
+		suggestedGoVersion = "1.17.x"
 	)
-	// Go 1.16 was released on Febuary 16th, 2021.
-	minGoVersionDate := time.Date(2021, 2, 16, 0, 0, 0, 0, time.UTC)
 
-	version := cache.GoEnv.GOVERSION
+	rxVersion := regexp.MustCompile(`go\d+\.\d+(\.\d)?`)
+	version := rxVersion.FindString(cache.GoEnv.GOVERSION)
 	if version == "" {
 		// Go 1.15.x and older do not have GOVERSION yet.
 		// We could go the extra mile and fetch it via 'go version',
@@ -265,37 +262,6 @@ func goVersionOK() bool {
 		return false
 	}
 
-	if strings.HasPrefix(version, "devel ") {
-		commitAndDate := strings.TrimPrefix(version, "devel ")
-		// Remove commit hash and architecture from version
-		startDateIdx := strings.IndexByte(commitAndDate, ' ') + 1
-		if startDateIdx < 0 {
-			// Custom version; assume the user knows what they're doing.
-			// TODO: cover this in a test
-			return true
-		}
-
-		// TODO: once we support Go 1.17 and later, use the major Go
-		// version included in its devel versions:
-		//
-		//   go version devel go1.17-8518aac314 ...
-
-		date := commitAndDate[startDateIdx:]
-
-		versionDate, err := time.Parse(gitTimeFormat, date)
-		if err != nil {
-			// Custom version; assume the user knows what they're doing.
-			return true
-		}
-
-		if versionDate.After(minGoVersionDate) {
-			return true
-		}
-
-		fmt.Fprintf(os.Stderr, "Go version %q is too old; please upgrade to Go %s or a newer devel version\n", version, suggestedGoVersion)
-		return false
-	}
-
 	versionSemver := "v" + strings.TrimPrefix(version, "go")
 	if semver.Compare(versionSemver, minGoVersionSemver) < 0 {
 		fmt.Fprintf(os.Stderr, "Go version %q is too old; please upgrade to Go %s\n", version, suggestedGoVersion)
@@ -369,23 +335,6 @@ func mainErr(args []string) error {
 
 	toolexecImportPath := os.Getenv("TOOLEXEC_IMPORTPATH")
 
-	// Workaround for https://github.com/golang/go/issues/44963.
-	// TODO(mvdan): remove once we only support Go 1.17 and later.
-	if tool == "compile" && !strings.Contains(toolexecImportPath, ".test]") {
-		isTestPkg := false
-		_, paths := splitFlagsFromFiles(args, ".go")
-		for _, path := range paths {
-			if strings.HasSuffix(path, "_test.go") {
-				isTestPkg = true
-				break
-			}
-		}
-		if isTestPkg {
-			forPkg := strings.TrimSuffix(toolexecImportPath, "_test")
-			toolexecImportPath = fmt.Sprintf("%s [%s.test]", toolexecImportPath, forPkg)
-		}
-	}
-
 	curPkg = cache.ListedPackages[toolexecImportPath]
 	if curPkg == nil {
 		return fmt.Errorf("TOOLEXEC_IMPORTPATH not found in listed packages: %s", toolexecImportPath)
@@ -673,10 +622,9 @@ func transformCompile(args []string) ([]string, error) {
 		return nil, err
 	}
 
-	if (curPkg.ImportPath == "runtime" && opts.Tiny) || curPkg.ImportPath == "runtime/internal/sys" {
-		// Even though these packages aren't private, we will still process
-		// them later to remove build information and strip code from the
-		// runtime. However, we only want flags to work on private packages.
+	if curPkg.ImportPath == "runtime" && opts.Tiny {
+		// When using -tiny, we call stripRuntime below.
+		// We don't want -literals and -debugdir to apply, though.
 		opts.GarbleLiterals = false
 		opts.DebugDir = ""
 	} else if !curPkg.Private {
@@ -706,29 +654,9 @@ func transformCompile(args []string) ([]string, error) {
 
 	for i, file := range files {
 		name := filepath.Base(paths[i])
-		switch curPkg.ImportPath {
-		case "runtime":
+		if curPkg.ImportPath == "runtime" && opts.Tiny {
 			// strip unneeded runtime code
 			stripRuntime(name, file)
-		case "runtime/internal/sys":
-			// The first declaration in zversion.go contains the Go
-			// version as follows. Replace it here, since the
-			// linker's -X does not work with constants.
-			//
-			//     const TheVersion = `devel ...`
-			//
-			// Don't touch the source in any other way.
-			// TODO: remove once we only support Go 1.17 and later,
-			// as from that point we can just rely on linking -X flags.
-			if name != "zversion.go" {
-				break
-			}
-			spec := file.Decls[0].(*ast.GenDecl).Specs[0].(*ast.ValueSpec)
-			if len(spec.Names) != 1 || spec.Names[0].Name != "TheVersion" {
-				break
-			}
-			lit := spec.Values[0].(*ast.BasicLit)
-			lit.Value = "`unknown`"
 		}
 		if strings.HasPrefix(name, "_cgo_") {
 			// Don't obfuscate cgo code, since it's generated and it gets messy.
@@ -848,7 +776,7 @@ func (tf *transformer) handleDirectives(comments []*ast.CommentGroup) {
 // Once we support go:linkname well and once we can obfuscate the runtime
 // package, this entire map can likely go away.
 //
-// The list was obtained via scripts/runtime-related.sh on Go 1.16.
+// The list was obtained via scripts/runtime-related.sh on Go 1.17.
 var runtimeRelated = map[string]bool{
 	"bufio":                                  true,
 	"bytes":                                  true,
@@ -861,9 +789,12 @@ var runtimeRelated = map[string]bool{
 	"fmt":                                    true,
 	"hash":                                   true,
 	"hash/crc32":                             true,
+	"internal/abi":                           true,
 	"internal/bytealg":                       true,
 	"internal/cpu":                           true,
 	"internal/fmtsort":                       true,
+	"internal/goexperiment":                  true,
+	"internal/itoa":                          true,
 	"internal/nettrace":                      true,
 	"internal/oserror":                       true,
 	"internal/poll":                          true,
@@ -910,11 +841,6 @@ var runtimeRelated = map[string]bool{
 	"unsafe":                                 true,
 	"vendor/golang.org/x/net/dns/dnsmessage": true,
 	"vendor/golang.org/x/net/route":          true,
-
-	// Manual additions for Go 1.17 as of June 2021.
-	"internal/abi":          true,
-	"internal/itoa":         true,
-	"internal/goexperiment": true,
 }
 
 // isPrivate checks if a package import path should be considered private,
@@ -1791,7 +1717,7 @@ func alterTrimpath(flags []string) []string {
 	return flagSetValue(flags, "-trimpath", sharedTempDir+"=>;"+trimpath)
 }
 
-// buildFlags is obtained from 'go help build' as of Go 1.16.
+// buildFlags is obtained from 'go help build' as of Go 1.17.
 var buildFlags = map[string]bool{
 	"-a":             true,
 	"-n":             true,
@@ -1819,7 +1745,7 @@ var buildFlags = map[string]bool{
 	"-overlay":       true,
 }
 
-// booleanFlags is obtained from 'go help build' and 'go help testflag' as of Go 1.16.
+// booleanFlags is obtained from 'go help build' and 'go help testflag' as of Go 1.17.
 var booleanFlags = map[string]bool{
 	// Shared build flags.
 	"-a":          true,
diff --git a/runtime_strip.go b/runtime_strip.go
index cfc5a28..4dd6af0 100644
--- a/runtime_strip.go
+++ b/runtime_strip.go
@@ -139,8 +139,8 @@ func stripRuntime(filename string, file *ast.File) {
 
 	switch filename {
 	case "runtime1.go":
-		// On Go 1.16.x, the code above results in runtime1.go having an
-		// unused import. Mark it as used via "var _ = pkg.Func".
+		// On Go 1.17.x, the code above results in runtime1.go having an
+		// unused import. Make it an underscore import.
 		// If this is a recurring problem, we could go for a more
 		// generic solution like x/tools/imports.
 		for _, imp := range file.Imports {
diff --git a/testdata/mod/rsc.io_sampler_v1.99.99.txt b/testdata/mod/rsc.io_sampler_v1.99.99.txt
index 547364e..e89cacc 100644
--- a/testdata/mod/rsc.io_sampler_v1.99.99.txt
+++ b/testdata/mod/rsc.io_sampler_v1.99.99.txt
@@ -1,4 +1,4 @@
-rsc.io/sampler@v1.99.99
+module rsc.io/sampler@v1.99.99
 
 -- .mod --
 module "rsc.io/sampler"
diff --git a/testdata/mod/rsc.io_testonly_v1.0.0.txt b/testdata/mod/rsc.io_testonly_v1.0.0.txt
new file mode 100644
index 0000000..dfb8ca2
--- /dev/null
+++ b/testdata/mod/rsc.io_testonly_v1.0.0.txt
@@ -0,0 +1,9 @@
+rsc.io/testonly v1.0.0
+written by hand
+
+-- .mod --
+module rsc.io/testonly
+-- .info --
+{"Version":"v1.0.0"}
+-- testonly.go --
+package testonly
diff --git a/testdata/scripts/asm.txt b/testdata/scripts/asm.txt
index 9f77c9e..3584a19 100644
--- a/testdata/scripts/asm.txt
+++ b/testdata/scripts/asm.txt
@@ -20,7 +20,7 @@ binsubstr main$exe 'privateAdd' 'PublicAdd'
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/basic.txt b/testdata/scripts/basic.txt
index 228a858..32062eb 100644
--- a/testdata/scripts/basic.txt
+++ b/testdata/scripts/basic.txt
@@ -58,7 +58,7 @@ binsubstr main$exe 'garble_main.go' 'globalVar' 'globalFunc' $gofullversion
 -- go.mod --
 module test/mainfoo
 
-go 1.16
+go 1.17
 -- garble_main.go --
 package main
 
diff --git a/testdata/scripts/cgo.txt b/testdata/scripts/cgo.txt
index 98c4786..00b5bde 100644
--- a/testdata/scripts/cgo.txt
+++ b/testdata/scripts/cgo.txt
@@ -26,7 +26,7 @@ cmp stdout main.stdout
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/crossbuild.txt b/testdata/scripts/crossbuild.txt
index 6a0c3b9..1ad0b14 100644
--- a/testdata/scripts/crossbuild.txt
+++ b/testdata/scripts/crossbuild.txt
@@ -17,7 +17,7 @@ garble build
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/debugdir.txt b/testdata/scripts/debugdir.txt
index 8b7368b..e21758d 100644
--- a/testdata/scripts/debugdir.txt
+++ b/testdata/scripts/debugdir.txt
@@ -18,7 +18,7 @@ stderr 'test/main' # we force rebuilds with -debugdir
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/embed.txt b/testdata/scripts/embed.txt
index 38dfc0e..2c885f8 100644
--- a/testdata/scripts/embed.txt
+++ b/testdata/scripts/embed.txt
@@ -14,7 +14,7 @@ cmp stdout main.stdout
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 
 -- main.go --
 package main
diff --git a/testdata/scripts/goprivate.txt b/testdata/scripts/goprivate.txt
index 1b89573..fe771e6 100644
--- a/testdata/scripts/goprivate.txt
+++ b/testdata/scripts/goprivate.txt
@@ -32,7 +32,7 @@ bincmp out_rebuild out
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- standalone/main.go --
 package main
 
diff --git a/testdata/scripts/goversion.txt b/testdata/scripts/goversion.txt
index 0e73997..444dfec 100644
--- a/testdata/scripts/goversion.txt
+++ b/testdata/scripts/goversion.txt
@@ -7,38 +7,44 @@ env PATH=${WORK}/.bin${:}${PATH}
 # An empty go version.
 env GOVERSION=''
 ! garble build
-stderr 'Go version is too old'
+stderr 'Go version is too old; please upgrade to Go 1.17.x or a newer devel version'
 
 # We should error on a devel version that's too old.
+# Note that they lacked the "goN.M-" prefix.
 env GOVERSION='devel +afb5fca Sun Aug 07 00:00:00 2020 +0000'
 ! garble build
-stderr 'Go version.*Aug 07.*too old; please upgrade to Go 1.16.x or a newer devel version'
+stderr 'Go version is too old; please upgrade to Go 1.17.x or a newer devel version'
 
-# A future devel timestamp should be fine.
-env GOVERSION='devel +afb5fca Sun Sep 13 07:54:42 2021 +0000'
+# Another form of old version; with an old "goN.M-" prefix.
+env GOVERSION='devel go1.15-afb5fca Sun Aug 07 00:00:00 2020 +0000'
+! garble build
+stderr 'Go version "go1.15" is too old; please upgrade to Go 1.17.x'
+
+# A current devel version should be fine
+env GOVERSION='devel go1.18-ad97d204f0 Sun Sep 12 16:46:58 2021 +0000'
 ! garble build
 stderr 'mocking the real build'
 
 # We should error on a stable version that's too old.
 env GOVERSION='go1.14'
 ! garble build
-stderr 'Go version.*go1.14.*too old; please upgrade to Go 1.16.x'
+stderr 'Go version "go1.14" is too old; please upgrade to Go 1.17.x'
 ! stderr 'or a newer devel version'
 
 # We should accept a future stable version.
-env GOVERSION='go1.16.2'
+env GOVERSION='go1.18.2'
 ! garble build
 stderr 'mocking the real build'
 
 # We should accept custom devel strings.
-env GOVERSION='devel somecustomversion'
+env GOVERSION='devel go1.18-somecustomversion'
 ! garble build
 stderr 'mocking the real build'
 
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/implement.txt b/testdata/scripts/implement.txt
index 324733e..1695600 100644
--- a/testdata/scripts/implement.txt
+++ b/testdata/scripts/implement.txt
@@ -16,7 +16,7 @@ cmp stdout main.stdout
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/imports.txt b/testdata/scripts/imports.txt
index 3a4813f..90e614a 100644
--- a/testdata/scripts/imports.txt
+++ b/testdata/scripts/imports.txt
@@ -44,11 +44,17 @@ cmp stdout main.stdout
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 
 require (
-	rsc.io/quote v1.5.2
 	gopkg.in/garbletest.v2 v2.999.0
+	rsc.io/quote v1.5.2
+)
+
+require (
+	golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c // indirect
+	rsc.io/sampler v1.3.0 // indirect
+	rsc.io/testonly v1.0.0 // indirect
 )
 -- go.sum --
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c h1:pvCbr/wm8HzDD3fVywevekufpn6tCGPY3spdHeZJEsw=
@@ -59,6 +65,8 @@ rsc.io/quote v1.5.2 h1:3fEykkD9k7lYzXqCYrwGAf7iNhbk4yCjHmKBN9td4L0=
 rsc.io/quote v1.5.2/go.mod h1:LzX7hefJvL54yjefDEDHNONDjII0t9xZLPXsUe+TKr0=
 rsc.io/sampler v1.3.0 h1:HLGR/BgEtI3r0uymSP/nl2uPLsUnNJX8toRyhfpBTII=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+rsc.io/testonly v1.0.0 h1:K/VWHdO+Jv7woUXG0GzVNx1czBXUt3Ib1deaMn+xk64=
+rsc.io/testonly v1.0.0/go.mod h1:OqmGbIFOcF+XrFReLOGZ6BhMM7uMBiQwZsyNmh74SzY=
 -- garble_main.go --
 package main
 
diff --git a/testdata/scripts/init.txt b/testdata/scripts/init.txt
index f3364d2..1a15df7 100644
--- a/testdata/scripts/init.txt
+++ b/testdata/scripts/init.txt
@@ -13,7 +13,7 @@ cmp stderr main.stderr
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/ldflags.txt b/testdata/scripts/ldflags.txt
index 9c6ee60..bc2b347 100644
--- a/testdata/scripts/ldflags.txt
+++ b/testdata/scripts/ldflags.txt
@@ -23,7 +23,7 @@ binsubstr main$exe 'unexportedVersion'
 -- go.mod --
 module domain.test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/linkname.txt b/testdata/scripts/linkname.txt
index d6cc144..b0cd89c 100644
--- a/testdata/scripts/linkname.txt
+++ b/testdata/scripts/linkname.txt
@@ -15,7 +15,7 @@ cmp stderr main.stderr
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 
 replace big.chungus/meme => ./big.chungus/meme
 
@@ -99,7 +99,7 @@ func ByteIndex(s string, c byte) int
 -- big.chungus/meme/go.mod --
 module test/main
 
-go 1.16
+go 1.17
 
 -- big.chungus/meme/dante.go --
 package meme
diff --git a/testdata/scripts/literals.txt b/testdata/scripts/literals.txt
index 0e2b39c..edbd31b 100644
--- a/testdata/scripts/literals.txt
+++ b/testdata/scripts/literals.txt
@@ -57,7 +57,7 @@ garble -literals build std
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/modinfo.txt b/testdata/scripts/modinfo.txt
index 07c6020..fe5c261 100644
--- a/testdata/scripts/modinfo.txt
+++ b/testdata/scripts/modinfo.txt
@@ -15,7 +15,7 @@ binsubstr main$exe '(devel)'
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/plugin.txt b/testdata/scripts/plugin.txt
index 762eabb..a41ca20 100644
--- a/testdata/scripts/plugin.txt
+++ b/testdata/scripts/plugin.txt
@@ -29,7 +29,7 @@ cmp stderr main.stderr
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- plugin/main.go --
 package main
 
diff --git a/testdata/scripts/position.txt b/testdata/scripts/position.txt
index e406765..571ce27 100644
--- a/testdata/scripts/position.txt
+++ b/testdata/scripts/position.txt
@@ -19,7 +19,7 @@ stdout 'varPositions is sorted'
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- garble_main.go --
 package main
 
diff --git a/testdata/scripts/reflect.txt b/testdata/scripts/reflect.txt
index b6a5697..77255b6 100644
--- a/testdata/scripts/reflect.txt
+++ b/testdata/scripts/reflect.txt
@@ -17,7 +17,7 @@ cmp stdout main.stdout
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- garble_main.go --
 package main
 
diff --git a/testdata/scripts/reverse.txt b/testdata/scripts/reverse.txt
index 3ee82b6..0cf9dad 100644
--- a/testdata/scripts/reverse.txt
+++ b/testdata/scripts/reverse.txt
@@ -50,7 +50,7 @@ cmp stdout main-literals.stderr
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/seed.txt b/testdata/scripts/seed.txt
index 0f04b55..363ab88 100644
--- a/testdata/scripts/seed.txt
+++ b/testdata/scripts/seed.txt
@@ -78,7 +78,7 @@ exec ./main$exe funcName
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- main.go --
 package main
 
diff --git a/testdata/scripts/syntax.txt b/testdata/scripts/syntax.txt
index c44f87a..74c1da3 100644
--- a/testdata/scripts/syntax.txt
+++ b/testdata/scripts/syntax.txt
@@ -19,7 +19,7 @@ binsubstr main$exe 'globalVar' # 'globalType' matches on some, but not all, plat
 -- extra/go.mod --
 module private.source/extra
 
-go 1.16
+go 1.17
 -- extra/extra.go --
 package extra
 
@@ -29,7 +29,7 @@ func Func() string {
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 
 // We include an extra module to obfuscate, included in the same original source
 // code via a replace directive.
diff --git a/testdata/scripts/test.txt b/testdata/scripts/test.txt
index 0e3e08e..c7addd3 100644
--- a/testdata/scripts/test.txt
+++ b/testdata/scripts/test.txt
@@ -41,7 +41,7 @@ stdout 'package bar_test, func name: test/bar\.OriginalFuncName'
 -- go.mod --
 module test/bar
 
-go 1.16
+go 1.17
 -- bar.go --
 package bar
 
diff --git a/testdata/scripts/tiny.txt b/testdata/scripts/tiny.txt
index 6040da6..f017cbc 100644
--- a/testdata/scripts/tiny.txt
+++ b/testdata/scripts/tiny.txt
@@ -26,7 +26,7 @@ stderr 'panic: oh noes'
 -- go.mod --
 module test/main
 
-go 1.16
+go 1.17
 -- garble_main.go --
 package main