diff --git a/internal/crypto/ptls/old.go b/internal/crypto/ptls/old.go
index a8987673..0d9ca196 100644
--- a/internal/crypto/ptls/old.go
+++ b/internal/crypto/ptls/old.go
@@ -1,8 +1,8 @@
-// Copyright 2021 the Pinniped contributors. All Rights Reserved.
+// Copyright 2021-2023 the Pinniped contributors. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-//go:build !go1.17
-// +build !go1.17
+//go:build !go1.19
+// +build !go1.19
 
 package ptls
 
@@ -10,6 +10,6 @@ func init() {
 	// cause compile time failure if an older version of Go is used
 	`Pinniped's TLS configuration makes assumptions about how the Go standard library implementation of TLS works.
 It particular, we rely on the server controlling cipher suite selection.  For these assumptions to hold, Pinniped
-must be compiled with Go 1.17+.  If you are seeing this error message, your attempt to compile Pinniped with an
+must be compiled with Go 1.19+.  If you are seeing this error message, your attempt to compile Pinniped with an
 older Go compiler was explicitly failed to prevent an unsafe configuration.`
 }
diff --git a/internal/testutil/tempdir.go b/internal/testutil/tempdir.go
index 81c2759e..485de699 100644
--- a/internal/testutil/tempdir.go
+++ b/internal/testutil/tempdir.go
@@ -1,9 +1,6 @@
-// Copyright 2020-2022 the Pinniped contributors. All Rights Reserved.
+// Copyright 2020-2023 the Pinniped contributors. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-//go:build !go1.14
-// +build !go1.14
-
 package testutil
 
 import (
diff --git a/internal/testutil/tempdir_go1.14.go b/internal/testutil/tempdir_go1.14.go
deleted file mode 100644
index 7f3f1bcc..00000000
--- a/internal/testutil/tempdir_go1.14.go
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright 2020-2022 the Pinniped contributors. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0
-
-//go:build go1.14
-// +build go1.14
-
-package testutil
-
-import (
-	"io/ioutil" //nolint:staticcheck // ioutil is deprecated, but this file is for go1.14
-	"os"
-	"testing"
-
-	"github.com/stretchr/testify/require"
-)
-
-func TempDir(t *testing.T) string {
-	t.Helper()
-	dir, err := ioutil.TempDir("", "test-*")
-	require.NoError(t, err)
-	t.Cleanup(func() {
-		require.NoError(t, os.RemoveAll(dir))
-	})
-	return dir
-}
diff --git a/test/testlib/iplookup.go b/test/testlib/iplookup.go
index 1a6d5553..2a492ebb 100644
--- a/test/testlib/iplookup.go
+++ b/test/testlib/iplookup.go
@@ -1,9 +1,6 @@
-// Copyright 2020-2022 the Pinniped contributors. All Rights Reserved.
+// Copyright 2020-2023 the Pinniped contributors. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-//go:build !go1.14
-// +build !go1.14
-
 package testlib
 
 import (
@@ -13,5 +10,17 @@ import (
 
 // LookupIP looks up the IP address of the provided hostname, preferring IPv4.
 func LookupIP(ctx context.Context, hostname string) ([]net.IP, error) {
-	return net.DefaultResolver.LookupIP(ctx, "ip4", hostname)
+	ips, err := net.DefaultResolver.LookupIPAddr(ctx, hostname)
+	if err != nil {
+		return nil, err
+	}
+
+	// Filter out to only IPv4 addresses
+	var results []net.IP
+	for _, ip := range ips {
+		if ip.IP.To4() != nil {
+			results = append(results, ip.IP)
+		}
+	}
+	return results, nil
 }
diff --git a/test/testlib/iplookup_go1.14.go b/test/testlib/iplookup_go1.14.go
deleted file mode 100644
index 42f18e89..00000000
--- a/test/testlib/iplookup_go1.14.go
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2020-2022 the Pinniped contributors. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0
-
-//go:build go1.14
-// +build go1.14
-
-package testlib
-
-import (
-	"context"
-	"net"
-)
-
-// LookupIP looks up the IP address of the provided hostname, preferring IPv4.
-func LookupIP(ctx context.Context, hostname string) ([]net.IP, error) {
-	ips, err := net.DefaultResolver.LookupIPAddr(ctx, hostname)
-	if err != nil {
-		return nil, err
-	}
-
-	// Filter out to only IPv4 addresses
-	var results []net.IP
-	for _, ip := range ips {
-		if ip.IP.To4() != nil {
-			results = append(results, ip.IP)
-		}
-	}
-	return results, nil
-}