diff --git a/tools/cassandra/setupTask_test.go b/tools/cassandra/setupTask_test.go
index 6e50181e2b4..9a88d497964 100644
--- a/tools/cassandra/setupTask_test.go
+++ b/tools/cassandra/setupTask_test.go
@@ -47,7 +47,9 @@ func TestSetupSchemaTestSuite(t *testing.T) {
 }
 
 func (s *SetupSchemaTestSuite) SetupSuite() {
-	os.Setenv("CASSANDRA_HOST", environment.GetCassandraAddress())
+	if err := os.Setenv("CASSANDRA_HOST", environment.GetCassandraAddress()); err != nil {
+		s.Logger.Fatal("Failed to set CASSANDRA_HOST", tag.Error(err))
+	}
 	client, err := newTestCQLClient(systemKeyspace)
 	if err != nil {
 		s.Logger.Fatal("Error creating CQLClient", tag.Error(err))
diff --git a/tools/tdbg/app_test.go b/tools/tdbg/app_test.go
index aa350c54904..e251c9975cc 100644
--- a/tools/tdbg/app_test.go
+++ b/tools/tdbg/app_test.go
@@ -69,7 +69,7 @@ func (s *utilSuite) TestAcceptStringSliceArgsWithCommas() {
 			},
 		},
 	}
-	app.Run([]string{"testapp", "dostuff",
+	s.NoError(app.Run([]string{"testapp", "dostuff",
 		"--input", `{"field1": 34, "field2": false}`,
-		"--input", `{"numbers": [4,5,6]}`})
+		"--input", `{"numbers": [4,5,6]}`}))
 }
diff --git a/tools/tdbg/dlq_commands.go b/tools/tdbg/dlq_commands.go
index d0a9a7de6c6..1ddc7620fbf 100644
--- a/tools/tdbg/dlq_commands.go
+++ b/tools/tdbg/dlq_commands.go
@@ -29,6 +29,7 @@ import (
 	"os"
 
 	"github.com/urfave/cli/v2"
+	"go.uber.org/multierr"
 
 	"go.temporal.io/server/api/adminservice/v1"
 	enumsspb "go.temporal.io/server/api/enums/v1"
@@ -44,7 +45,7 @@ const (
 )
 
 // AdminGetDLQMessages gets DLQ metadata
-func AdminGetDLQMessages(c *cli.Context) error {
+func AdminGetDLQMessages(c *cli.Context) (err error) {
 	ctx, cancel := newContext(c)
 	defer cancel()
 
@@ -56,7 +57,10 @@ func AdminGetDLQMessages(c *cli.Context) error {
 	if err != nil {
 		return err
 	}
-	defer outputFile.Close()
+	defer func() {
+		// see https://pkg.go.dev/go.uber.org/multierr#hdr-Deferred_Functions
+		err = multierr.Combine(err, outputFile.Close())
+	}()
 
 	remainingMessageCount := common.EndMessageID
 	if c.IsSet(FlagMaxMessageCount) {
diff --git a/tools/tdbg/factory.go b/tools/tdbg/factory.go
index 88d224a5d23..5738358da0a 100644
--- a/tools/tdbg/factory.go
+++ b/tools/tdbg/factory.go
@@ -39,6 +39,7 @@ import (
 
 	"github.com/urfave/cli/v2"
 	"go.temporal.io/api/workflowservice/v1"
+	"go.uber.org/multierr"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/credentials/insecure"
@@ -193,11 +194,15 @@ func fetchCACert(pathOrUrl string) (caPool *x509.CertPool, err error) {
 	}
 
 	if strings.HasPrefix(pathOrUrl, "https://") {
-		resp, err := netClient.Get(pathOrUrl)
+		var resp *http.Response
+		resp, err = netClient.Get(pathOrUrl)
 		if err != nil {
 			return nil, err
 		}
-		defer resp.Body.Close()
+		defer func() {
+			// see https://pkg.go.dev/go.uber.org/multierr#hdr-Deferred_Functions
+			err = multierr.Combine(err, resp.Body.Close())
+		}()
 		caBytes, err = io.ReadAll(resp.Body)
 		if err != nil {
 			return nil, err
diff --git a/tools/tdbg/util.go b/tools/tdbg/util.go
index 6c7e898cb41..4921cccfdac 100644
--- a/tools/tdbg/util.go
+++ b/tools/tdbg/util.go
@@ -250,7 +250,9 @@ func paginate[V any](c *cli.Context, paginationFn collection.PaginationFn[V], pa
 		pageItems = append(pageItems, item)
 		if len(pageItems) == pageSize || !iter.HasNext() {
 			if isTableView {
-				printTable(pageItems)
+				if err := printTable(pageItems); err != nil {
+					return err
+				}
 			} else {
 				prettyPrintJSONObject(pageItems)
 			}