diff --git a/METADATA b/METADATA
index 06e3d85..12a4571 100644
--- a/METADATA
+++ b/METADATA
@@ -1,13 +1,15 @@
 name: "go-creachadair-stringset"
-description:
-    "The shell package implements basic shell command-line splitting."
-
+description: "The shell package implements basic shell command-line splitting."
 third_party {
   url {
     type: GIT
     value: "https://bitbucket.org/creachadair/shell.git"
   }
-  version: "v0.0.6"
-  last_upgrade_date { year: 2019 month: 06 day: 03 }
+  version: "v0.0.7"
   license_type: NOTICE
+  last_upgrade_date {
+    year: 2022
+    month: 3
+    day: 29
+  }
 }
diff --git a/bitbucket-pipelines.yml b/bitbucket-pipelines.yml
index d4b1a14..8acd906 100644
--- a/bitbucket-pipelines.yml
+++ b/bitbucket-pipelines.yml
@@ -16,14 +16,8 @@
 pipelines:
   default:  # run on each push
     - step:
-        image: golang:1.9
+        image: golang:1.16
         <<: *Verify
     - step:
-        image: golang:1.10
-        <<: *Verify
-    - step:
-        image: golang:1.11
-        <<: *Verify
-    - step:
-        image: golang:1.12
+        image: golang:1.17
         <<: *Verify
diff --git a/go.mod b/go.mod
index 045ecd4..77f93f3 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,5 @@
 module bitbucket.org/creachadair/shell
 
-go 1.12
+go 1.16
+
+require github.com/google/go-cmp v0.5.6
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..03e1a9c
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,4 @@
+github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/shell_test.go b/shell_test.go
index c5564a3..c6ef732 100644
--- a/shell_test.go
+++ b/shell_test.go
@@ -3,11 +3,11 @@
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
-	"reflect"
 	"strings"
 	"testing"
+
+	"github.com/google/go-cmp/cmp"
 )
 
 func TestQuote(t *testing.T) {
@@ -100,8 +100,8 @@
 		if ok != test.ok {
 			t.Errorf("Split %#q: got valid=%v, want %v", test.in, ok, test.ok)
 		}
-		if !reflect.DeepEqual(got, test.want) {
-			t.Errorf("Split %#q: got %+q, want %+q", test.in, got, test.want)
+		if diff := cmp.Diff(test.want, got); diff != "" {
+			t.Errorf("Split %#q: (-want, +got)\n%s", test.in, diff)
 		}
 	}
 }
@@ -137,11 +137,11 @@
 			t.Errorf("Unexpected scan error: %v", s.Err())
 		}
 
-		if !reflect.DeepEqual(got, test.want) {
-			t.Errorf("Scanner split prefix: got %+q, want %+q", got, test.want)
+		if diff := cmp.Diff(test.want, got); diff != "" {
+			t.Errorf("Scanner split prefix: (-want, +got)\n%s", diff)
 		}
-		if !reflect.DeepEqual(rest, test.rest) {
-			t.Errorf("Scanner split suffix: got %+q, want %+q", rest, test.rest)
+		if diff := cmp.Diff(test.rest, rest); diff != "" {
+			t.Errorf("Scanner split suffix: (-want, +got)\n%s", diff)
 		}
 	}
 }
@@ -167,8 +167,8 @@
 		if !ok {
 			t.Errorf("Split %+q: should be valid, but is not", s)
 		}
-		if !reflect.DeepEqual(got, test) {
-			t.Errorf("Split %+q: got %q, want %q", s, got, test)
+		if diff := cmp.Diff(test, got); diff != "" {
+			t.Errorf("Split %+q: (-want, +got)\n%s", s, diff)
 		}
 	}
 }
@@ -194,7 +194,7 @@
 			break
 		}
 	}
-	rest, err := ioutil.ReadAll(s.Rest())
+	rest, err := io.ReadAll(s.Rest())
 	if err != nil {
 		log.Fatal(err)
 	}