diff --git a/cmd/gdt/cmd/run.go b/cmd/gdt/cmd/run.go
index f71c809..8acfea0 100644
--- a/cmd/gdt/cmd/run.go
+++ b/cmd/gdt/cmd/run.go
@@ -1,15 +1,20 @@
 package cmd
 
 import (
+	"encoding/json"
+	"encoding/xml"
 	"fmt"
 	"os"
+	"path/filepath"
 	"strings"
 	"time"
 
+	"github.com/gdt-dev/core/api"
 	gdtcontext "github.com/gdt-dev/core/context"
 	"github.com/gdt-dev/core/run"
 	"github.com/gdt-dev/core/scenario"
 	"github.com/gdt-dev/core/suite"
+	"github.com/gdt-dev/core/testunit"
 	"github.com/spf13/cobra"
 
 	"github.com/gdt-dev/gdt/cmd/gdt/pkg/cli"
@@ -24,11 +29,24 @@ The command will run gdt test scenarios or test suites pointed to by <subject>.
 
 <subject> should be a path to a YAML file or a directory containing YAML files.
 
-Returns 0 on if all subject test scenarios complete without failure, 1
-otherwise.
+Returns 0 if all subject test scenarios complete without failure, 1 otherwise.
 `
 )
 
+var (
+	runOutputFormatHuman   = "human"
+	runOutputFormatJSON    = "json"
+	runOutputFormatXUnit   = "xunit"
+	defaultRunOutputFormat = runOutputFormatHuman
+	supportedOutputFormats = []string{
+		runOutputFormatHuman,
+		runOutputFormatJSON,
+		runOutputFormatXUnit,
+	}
+	optRunOutputFormat   = defaultRunOutputFormat
+	usageRunOutputFormat = `output format ("human","json","xunit")`
+)
+
 var RunCmd = &cobra.Command{
 	Use:     runUsage,
 	Short:   "run test scenario/suites.",
@@ -45,6 +63,11 @@ func init() {
 		false,
 		optQuietUsage,
 	)
+	RunCmd.Flags().StringVarP(
+		&optRunOutputFormat,
+		"output-format", "o",
+		defaultRunOutputFormat, usageRunOutputFormat,
+	)
 }
 
 func doRun(cmd *cobra.Command, args []string) error {
@@ -55,7 +78,7 @@ func doRun(cmd *cobra.Command, args []string) error {
 		cli.CommonOptions.Verbose = true
 	}
 	ctx := gdtcontext.New(gdtcontext.WithDebugPrefix(debugPrefix))
-	run := run.New()
+	runs := []*run.Run{}
 	for _, path := range args {
 		fi, err := os.Stat(path)
 		if err != nil {
@@ -64,6 +87,7 @@ func doRun(cmd *cobra.Command, args []string) error {
 			}
 			return err
 		}
+		run := run.New()
 		if fi.IsDir() {
 			cli.Df("loading suite from directory %q ...", path)
 			su, err := suite.FromDir(path)
@@ -97,34 +121,49 @@ func doRun(cmd *cobra.Command, args []string) error {
 				return err
 			}
 		}
+		// We do this here so that we get more immediate output results
+		// when using human output format
+		if optRunOutputFormat == runOutputFormatHuman {
+			printRun(run)
+		}
+		runs = append(runs, run)
+	}
+	if optRunOutputFormat != runOutputFormatHuman {
+		return printResults(runs)
 	}
+	return nil
+}
 
+// printRun outputs the human-readable results of a test scenario run.
+func printRun(
+	run *run.Run,
+) {
 	if !optQuiet {
 		paths := run.ScenarioPaths()
 		for _, path := range paths {
+			shortPath := filepath.Base(path)
 			if cli.CommonOptions.Verbose {
-				fmt.Printf("=== RUN: %s\n", path)
+				fmt.Printf("=== RUN: %s\n", shortPath)
 			}
 			var scenElapsed time.Duration
 
 			results := run.ScenarioResults(path)
 			scenOK := true
+
 			for _, res := range results {
 				scenElapsed += res.Elapsed()
 				scenOK = scenOK && res.OK()
 				printTestUnitResult(res)
 			}
 
-			if !optQuiet {
-				if scenOK {
-					if cli.CommonOptions.Verbose {
-						fmt.Printf("PASS (%s)\n", scenElapsed)
-					} else {
-						fmt.Printf("ok\t%s\t%s\n", path, scenElapsed)
-					}
+			if scenOK {
+				if cli.CommonOptions.Verbose {
+					fmt.Printf("PASS (%s)\n", scenElapsed)
 				} else {
-					fmt.Printf("FAIL\t%s\t%s\n", path, scenElapsed)
+					fmt.Printf("ok\t%s\t%s\n", path, scenElapsed)
 				}
+			} else {
+				fmt.Printf("FAIL\t%s\t%s\n", path, scenElapsed)
 			}
 		}
 	}
@@ -138,10 +177,9 @@ func doRun(cmd *cobra.Command, args []string) error {
 			fmt.Println("PASS")
 		}
 	}
-	return nil
 }
 
-func printTestUnitResult(r run.TestUnitResult) {
+func printTestUnitResult(r testunit.Result) {
 	if r.Skipped() {
 		if cli.CommonOptions.Verbose {
 			fmt.Printf("--- SKIP: %s (%s)\n", r.Name(), r.Elapsed())
@@ -172,6 +210,38 @@ func printTestUnitResult(r run.TestUnitResult) {
 	}
 }
 
+// printResults outputs the test results of all test scenarios for JSON or
+// XUnit output.
+func printResults(
+	runs []*run.Run,
+) error {
+	suites := []api.XUnitTestSuite{}
+	for _, r := range runs {
+		suites = append(suites, r.XUnit()...)
+	}
+	res := api.XUnitResults{
+		TestSuites: suites,
+	}
+	var err error
+	var out string
+	var b []byte
+	if optRunOutputFormat == runOutputFormatJSON {
+		b, err = json.MarshalIndent(res, "", "  ")
+		if err != nil {
+			return err
+		}
+		out = string(b)
+	} else {
+		b, err = xml.MarshalIndent(res, "", "  ")
+		if err != nil {
+			return err
+		}
+		out = xml.Header + string(b)
+	}
+	fmt.Println(out)
+	return nil
+}
+
 func indent(subject string, level int) string {
 	indentStr := strings.Repeat(" ", level*4)
 	b := strings.Builder{}
diff --git a/cmd/gdt/go.mod b/cmd/gdt/go.mod
index 4071b44..b6c284f 100644
--- a/cmd/gdt/go.mod
+++ b/cmd/gdt/go.mod
@@ -3,7 +3,7 @@ module github.com/gdt-dev/gdt/cmd/gdt
 go 1.24.3
 
 require (
-	github.com/gdt-dev/core v1.12.0
+	github.com/gdt-dev/core v1.12.1
 	github.com/gdt-dev/http v1.11.0
 	github.com/gdt-dev/kube v1.11.0
 	github.com/samber/lo v1.51.0
diff --git a/cmd/gdt/go.sum b/cmd/gdt/go.sum
index 28aed87..af8f332 100644
--- a/cmd/gdt/go.sum
+++ b/cmd/gdt/go.sum
@@ -21,8 +21,8 @@ github.com/evanphx/json-patch/v5 v5.9.11 h1:/8HVnzMq13/3x9TPvjG08wUGqBTmZBsCWzjT
 github.com/evanphx/json-patch/v5 v5.9.11/go.mod h1:3j+LviiESTElxA4p3EMKAB9HXj3/XEtnUf6OZxqIQTM=
 github.com/fxamacker/cbor/v2 v2.9.0 h1:NpKPmjDBgUfBms6tr6JZkTHtfFGcMKsw3eGcmD/sapM=
 github.com/fxamacker/cbor/v2 v2.9.0/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
-github.com/gdt-dev/core v1.12.0 h1:/Apz/cwEWhkT3jmexIDQmnVbbzzC6iwmgunfpPMyMx0=
-github.com/gdt-dev/core v1.12.0/go.mod h1:hGXsI+PXavvLkm0BQIYKZ1O3yRw86m/VD2xFiNwFR/Y=
+github.com/gdt-dev/core v1.12.1 h1:nW6/+aY42ZpQZaWbKwDQyYt10XXwZj0scV5ca3NMAnY=
+github.com/gdt-dev/core v1.12.1/go.mod h1:hGXsI+PXavvLkm0BQIYKZ1O3yRw86m/VD2xFiNwFR/Y=
 github.com/gdt-dev/http v1.11.0 h1:xEkdLLXbI3wwd61RDcjE2lQdsQ+R0y7ROlbjbBDAe/o=
 github.com/gdt-dev/http v1.11.0/go.mod h1:SHsSUi6+OybfQCY7kSaLc9LaKovXokVjVKaAzVkZvFE=
 github.com/gdt-dev/kube v1.11.0 h1:o6/Dq5ho6LJP1FPxili1jvYuRl+D6HNhzCyXlfmQOpg=
diff --git a/go.mod b/go.mod
index d0d8ac0..d3012ec 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/gdt-dev/gdt
 
 go 1.24.3
 
-require github.com/gdt-dev/core v1.12.0
+require github.com/gdt-dev/core v1.12.1
 
 require (
 	github.com/Masterminds/semver/v3 v3.4.0 // indirect
diff --git a/go.sum b/go.sum
index 24a42d0..60dadfc 100644
--- a/go.sum
+++ b/go.sum
@@ -4,8 +4,8 @@ github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEe
 github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/gdt-dev/core v1.12.0 h1:/Apz/cwEWhkT3jmexIDQmnVbbzzC6iwmgunfpPMyMx0=
-github.com/gdt-dev/core v1.12.0/go.mod h1:hGXsI+PXavvLkm0BQIYKZ1O3yRw86m/VD2xFiNwFR/Y=
+github.com/gdt-dev/core v1.12.1 h1:nW6/+aY42ZpQZaWbKwDQyYt10XXwZj0scV5ca3NMAnY=
+github.com/gdt-dev/core v1.12.1/go.mod h1:hGXsI+PXavvLkm0BQIYKZ1O3yRw86m/VD2xFiNwFR/Y=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
 github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=