diff --git a/doc.go b/doc.go
index 3095f42b1e..57e6f50e4a 100644
--- a/doc.go
+++ b/doc.go
@@ -93,42 +93,42 @@
 // Operation.Done field indicates it is finished. To do this, use the service's
 // Operation client, and a loop, like so:
 //
-//   import (
-//		gax "github.com/googleapis/gax-go/v2"
-//   )
-//
-//   // existing application code...
-//
-//   // API call that returns an Operation.
-//	 op, err := myApiClient.CalculateFoo().Do()
-//	 if err != nil {
-//		// handle err
-//	 }
-//
-//	 operationsService = myapi.NewOperationsService(myApiClient)
-//   pollingBackoff := gax.Backoff{
-// 	    Initial:    time.Second,
-// 	    Max:        time.Minute, // Max time between polling attempts.
-// 	    Multiplier: 2,
-//   }
-//	 for {
-//		if op.Done {
-//			break
-//		}
-//		// not done, sleep with backoff, then poll again
-//		if err := gax.Sleep(ctx, pollingBackoff.Pause()); err != nil {
-//			// handle error
-//		}
-//		op, err := operationsService.Get(op.Name).Do()
-//		if err != nil {
-//			// handle error
-//		}
-//	 }
-//
-//	 if op.Error != nil {
-//		// handle operation err
-//	 }
-//
-//	 // Do something with the response
-//	 fmt.Println(op.Response)
+//	  import (
+//			gax "github.com/googleapis/gax-go/v2"
+//	  )
+//
+//	  // existing application code...
+//
+//	  // API call that returns an Operation.
+//		 op, err := myApiClient.CalculateFoo().Do()
+//		 if err != nil {
+//			// handle err
+//		 }
+//
+//		 operationsService = myapi.NewOperationsService(myApiClient)
+//	  pollingBackoff := gax.Backoff{
+//		    Initial:    time.Second,
+//		    Max:        time.Minute, // Max time between polling attempts.
+//		    Multiplier: 2,
+//	  }
+//		 for {
+//			if op.Done {
+//				break
+//			}
+//			// not done, sleep with backoff, then poll again
+//			if err := gax.Sleep(ctx, pollingBackoff.Pause()); err != nil {
+//				// handle error
+//			}
+//			op, err := operationsService.Get(op.Name).Do()
+//			if err != nil {
+//				// handle error
+//			}
+//		 }
+//
+//		 if op.Error != nil {
+//			// handle operation err
+//		 }
+//
+//		 // Do something with the response
+//		 fmt.Println(op.Response)
 package api
diff --git a/internal/kokoro/vet.sh b/internal/kokoro/vet.sh
index 15b9f2e339..865eaa5ec9 100755
--- a/internal/kokoro/vet.sh
+++ b/internal/kokoro/vet.sh
@@ -7,7 +7,7 @@
 # Fail on error, and display commands being run.
 set -ex
 
-if [[ $(go version) != *"go1.20"* ]]; then
+if [[ $(go version) != *"go1.22"* ]]; then
   exit 0
 fi
 
@@ -25,24 +25,26 @@ goimports -l . 2>&1 | tee /dev/stderr | (! read)
 
 # Runs the linter. Regrettably the linter is very simple and does not provide the ability to exclude rules or files,
 # so we rely on inverse grepping to do this for us.
-golint ./... 2>&1 | ( \
-  grep -v "gen.go" | \
-  grep -v "disco.go" | \
-  grep -v "exported const DefaultDelayThreshold should have comment" | \
-  grep -v "exported const DefaultBundleCountThreshold should have comment" | \
-  grep -v "exported const DefaultBundleByteThreshold should have comment" | \
-  grep -v "exported const DefaultBufferedByteLimit should have comment" | \
-  grep -v "error var Done should have name of the form ErrFoo" | \
-  grep -v "exported method APIKey.RoundTrip should have comment or be unexported" | \
-  grep -v "exported method MarshalStyle.JSONReader should have comment or be unexported" | \
-  grep -v "UnmarshalJSON should have comment or be unexported" | \
-  grep -v "MarshalJSON should have comment or be unexported" | \
-  grep -v ".Apply should have comment or be unexported" | \
-  grep -vE "\.pb\.go:" || true) | tee /dev/stderr | (! read)
-
-staticcheck -go 1.9 ./... 2>&1 | ( \
-  grep -v "SA1019" | \
-  grep -v "S1007" | \
-  grep -v "error var Done should have name of the form ErrFoo" | \
-  grep -v "examples" | \
-  grep -v "gen.go" || true) | tee /dev/stderr | (! read)
+golint ./... 2>&1 | (
+  grep -v "gen.go" |
+    grep -v "disco.go" |
+    grep -v "exported const DefaultDelayThreshold should have comment" |
+    grep -v "exported const DefaultBundleCountThreshold should have comment" |
+    grep -v "exported const DefaultBundleByteThreshold should have comment" |
+    grep -v "exported const DefaultBufferedByteLimit should have comment" |
+    grep -v "error var Done should have name of the form ErrFoo" |
+    grep -v "exported method APIKey.RoundTrip should have comment or be unexported" |
+    grep -v "exported method MarshalStyle.JSONReader should have comment or be unexported" |
+    grep -v "UnmarshalJSON should have comment or be unexported" |
+    grep -v "MarshalJSON should have comment or be unexported" |
+    grep -v ".Apply should have comment or be unexported" |
+    grep -vE "\.pb\.go:" || true
+) | tee /dev/stderr | (! read)
+
+staticcheck -go 1.9 ./... 2>&1 | (
+  grep -v "SA1019" |
+    grep -v "S1007" |
+    grep -v "error var Done should have name of the form ErrFoo" |
+    grep -v "examples" |
+    grep -v "gen.go" || true
+) | tee /dev/stderr | (! read)
diff --git a/internal/settings.go b/internal/settings.go
index e17141a6f5..6b709da707 100644
--- a/internal/settings.go
+++ b/internal/settings.go
@@ -89,6 +89,7 @@ func (ds *DialSettings) HasCustomAudience() bool {
 	return len(ds.Audiences) > 0
 }
 
+// IsNewAuthLibraryEnabled returns true if the new auth library should be used.
 func (ds *DialSettings) IsNewAuthLibraryEnabled() bool {
 	if ds.EnableNewAuthLibrary {
 		return true
@@ -185,6 +186,8 @@ func (ds *DialSettings) GetUniverseDomain() string {
 	return ds.UniverseDomain
 }
 
+// IsUniverseDomainGDU returns true if the universe domain is the default Google
+// universe.
 func (ds *DialSettings) IsUniverseDomainGDU() bool {
 	return ds.GetUniverseDomain() == ds.GetDefaultUniverseDomain()
 }