diff --git a/src/commands/root.ts b/src/commands/root.ts
index 52c4059..0777bcb 100644
--- a/src/commands/root.ts
+++ b/src/commands/root.ts
@@ -3,6 +3,7 @@ import { resolveCliVersion } from '../version.js';
 import { createDevCommand } from './dev.js';
 import { createDoctorCommand } from './doctor.js';
 import { createNewCommand } from './new.js';
+import { createTestCommand } from './test.js';
 
 export function createRootCommand(version = resolveCliVersion()): Command {
   return new Command()
@@ -18,5 +19,6 @@ export function createRootCommand(version = resolveCliVersion()): Command {
     .action(() => undefined)
     .addCommand(createDoctorCommand())
     .addCommand(createNewCommand())
-    .addCommand(createDevCommand());
+    .addCommand(createDevCommand())
+    .addCommand(createTestCommand());
 }
diff --git a/src/commands/test.ts b/src/commands/test.ts
new file mode 100644
index 0000000..324e690
--- /dev/null
+++ b/src/commands/test.ts
@@ -0,0 +1,29 @@
+import { Command } from 'commander';
+import {
+  superviseDevProcesses,
+  type DevOrchestratorOptions,
+} from '../dev/orchestrator.js';
+import type { DevProcessSpec } from '../dev/project.js';
+import { TerminalOutput } from '../output/terminal.js';
+import { resolveTestProcessPlan } from '../testing/project.js';
+
+export interface TestCommandOptions extends DevOrchestratorOptions {
+  readonly cwd?: () => string;
+  readonly resolvePlan?: (cwd: string) => readonly DevProcessSpec[];
+}
+
+export function createTestCommand(options: TestCommandOptions = {}): Command {
+  const cwd = options.cwd ?? process.cwd;
+  const output = options.output ?? new TerminalOutput();
+  const resolvePlan = options.resolvePlan ?? resolveTestProcessPlan;
+
+  return new Command('test')
+    .description('Run tests for a supported StellarForge project.')
+    .action(async () => {
+      const plan = resolvePlan(cwd());
+      output.info(
+        `Running ${plan.length} project test workflow${plan.length === 1 ? '' : 's'}.`,
+      );
+      await superviseDevProcesses(plan, { ...options, output });
+    });
+}
diff --git a/src/testing/project.ts b/src/testing/project.ts
new file mode 100644
index 0000000..18e2cfc
--- /dev/null
+++ b/src/testing/project.ts
@@ -0,0 +1,86 @@
+import { existsSync, readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+import type { DevProcessSpec } from '../dev/project.js';
+import { ValidationCliError } from '../errors/errors.js';
+
+interface ProjectPackage {
+  readonly name?: unknown;
+  readonly scripts?: unknown;
+}
+
+function resolveNodeTestPlan(projectRoot: string): DevProcessSpec | undefined {
+  const packagePath = resolve(projectRoot, 'package.json');
+
+  if (!existsSync(packagePath)) {
+    return undefined;
+  }
+
+  let projectPackage: ProjectPackage;
+  try {
+    projectPackage = JSON.parse(
+      readFileSync(packagePath, 'utf8'),
+    ) as ProjectPackage;
+  } catch (error) {
+    throw new ValidationCliError('package.json is not valid JSON.', {
+      cause: error,
+    });
+  }
+
+  if (
+    projectPackage.scripts === null ||
+    typeof projectPackage.scripts !== 'object' ||
+    Array.isArray(projectPackage.scripts)
+  ) {
+    throw new ValidationCliError('package.json must define a scripts object.');
+  }
+
+  const scripts = projectPackage.scripts as Record<string, unknown>;
+  if (typeof scripts.test !== 'string') {
+    throw new ValidationCliError(
+      'This Node.js project does not define a test script. Add a package.json test script before using `stellarforge test`.',
+    );
+  }
+
+  const projectName =
+    typeof projectPackage.name === 'string' && projectPackage.name.length > 0
+      ? projectPackage.name
+      : 'app';
+
+  return {
+    label: `${projectName}:test`,
+    command: process.platform === 'win32' ? 'npm.cmd' : 'npm',
+    args: ['run', 'test'],
+    cwd: projectRoot,
+  };
+}
+
+function resolveCargoTestPlan(projectRoot: string): DevProcessSpec | undefined {
+  if (!existsSync(resolve(projectRoot, 'Cargo.toml'))) {
+    return undefined;
+  }
+
+  return {
+    label: 'cargo:test',
+    command: process.platform === 'win32' ? 'cargo.exe' : 'cargo',
+    args: ['test'],
+    cwd: projectRoot,
+  };
+}
+
+export function resolveTestProcessPlan(cwd: string): readonly DevProcessSpec[] {
+  const projectRoot = resolve(cwd);
+  const nodePlan = resolveNodeTestPlan(projectRoot);
+
+  if (nodePlan !== undefined) {
+    return [nodePlan];
+  }
+
+  const cargoPlan = resolveCargoTestPlan(projectRoot);
+  if (cargoPlan !== undefined) {
+    return [cargoPlan];
+  }
+
+  throw new ValidationCliError(
+    'No supported StellarForge test workflow was found. Expected a package.json test script or a Cargo.toml workspace.',
+  );
+}
diff --git a/tests/root-command.test.ts b/tests/root-command.test.ts
index 70bfcce..36deb99 100644
--- a/tests/root-command.test.ts
+++ b/tests/root-command.test.ts
@@ -10,6 +10,7 @@ describe('StellarForge root command', () => {
       'doctor',
       'new',
       'dev',
+      'test',
     ]);
   });
 
@@ -23,6 +24,7 @@ describe('StellarForge root command', () => {
     expect(help).toContain('doctor');
     expect(help).toContain('new');
     expect(help).toContain('dev');
+    expect(help).toContain('test');
     expect(help).toContain('-V, --version');
     expect(help).toContain('-h, --help');
   });
diff --git a/tests/test-command.test.ts b/tests/test-command.test.ts
new file mode 100644
index 0000000..7dfab81
--- /dev/null
+++ b/tests/test-command.test.ts
@@ -0,0 +1,90 @@
+import { PassThrough } from 'node:stream';
+import { describe, expect, it } from 'vitest';
+import { createTestCommand } from '../src/commands/test.js';
+import type { ManagedChildProcess } from '../src/dev/orchestrator.js';
+import { SubprocessCliError } from '../src/errors/errors.js';
+import { createCapturedTerminalOutput } from './helpers/index.js';
+
+class TestChild implements ManagedChildProcess {
+  readonly stdout = new PassThrough();
+  readonly stderr = new PassThrough();
+  #exitListener:
+    ((code: number | null, signal: NodeJS.Signals | null) => void) | undefined;
+
+  once(event: 'error', listener: (error: Error) => void): this;
+  once(
+    event: 'exit',
+    listener: (code: number | null, signal: NodeJS.Signals | null) => void,
+  ): this;
+  once(
+    event: 'error' | 'exit',
+    listener:
+      | ((error: Error) => void)
+      | ((code: number | null, signal: NodeJS.Signals | null) => void),
+  ): this {
+    if (event === 'exit') {
+      this.#exitListener = listener as (
+        code: number | null,
+        signal: NodeJS.Signals | null,
+      ) => void;
+    }
+    return this;
+  }
+
+  kill(): boolean {
+    return true;
+  }
+
+  exit(code: number): void {
+    this.#exitListener?.(code, null);
+  }
+}
+
+describe('test command', () => {
+  it('streams project test output and completes on a successful child result', async () => {
+    const child = new TestChild();
+    const captured = createCapturedTerminalOutput();
+    const command = createTestCommand({
+      cwd: () => '/workspace',
+      output: captured.output,
+      resolvePlan: () => [
+        {
+          label: 'demo:test',
+          command: 'npm',
+          args: ['run', 'test'],
+          cwd: '/workspace',
+        },
+      ],
+      spawnProcess: () => child,
+    });
+
+    const running = command.parseAsync(['node', 'test']);
+    child.stdout.write('all tests passed\n');
+    child.exit(0);
+    await running;
+
+    expect(captured.stdoutText()).toContain('Running 1 project test workflow.');
+    expect(captured.stdoutText()).toContain('[demo:test] all tests passed');
+  });
+
+  it('preserves failing project tests as a non-zero subprocess failure', async () => {
+    const child = new TestChild();
+    const command = createTestCommand({
+      cwd: () => '/workspace',
+      resolvePlan: () => [
+        {
+          label: 'demo:test',
+          command: 'npm',
+          args: ['run', 'test'],
+          cwd: '/workspace',
+        },
+      ],
+      spawnProcess: () => child,
+    });
+
+    const running = command.parseAsync(['node', 'test']);
+    child.exit(9);
+
+    await expect(running).rejects.toBeInstanceOf(SubprocessCliError);
+  });
+});
diff --git a/tests/test-project.test.ts b/tests/test-project.test.ts
new file mode 100644
index 0000000..186c282
--- /dev/null
+++ b/tests/test-project.test.ts
@@ -0,0 +1,61 @@
+import { writeFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { describe, expect, it } from 'vitest';
+import { ValidationCliError } from '../src/errors/errors.js';
+import { resolveTestProcessPlan } from '../src/testing/project.js';
+import { withTempDirectory } from './helpers/index.js';
+
+describe('project test workflow resolution', () => {
+  it('resolves a Node.js test script without executing package script text directly', () =>
+    withTempDirectory((root) => {
+      writeFileSync(
+        join(root, 'package.json'),
+        JSON.stringify({
+          name: 'demo',
+          scripts: { test: 'node --test && echo never-interpolated' },
+        }),
+      );
+
+      expect(resolveTestProcessPlan(root)).toEqual([
+        {
+          label: 'demo:test',
+          command: process.platform === 'win32' ? 'npm.cmd' : 'npm',
+          args: ['run', 'test'],
+          cwd: root,
+        },
+      ]);
+    }));
+
+  it('resolves a Cargo workspace test workflow', () =>
+    withTempDirectory((root) => {
+      writeFileSync(join(root, 'Cargo.toml'), '[workspace]\nmembers = []\n');
+
+      expect(resolveTestProcessPlan(root)).toEqual([
+        {
+          label: 'cargo:test',
+          command: process.platform === 'win32' ? 'cargo.exe' : 'cargo',
+          args: ['test'],
+          cwd: root,
+        },
+      ]);
+    }));
+
+  it('rejects unsupported and malformed projects with actionable guidance', () =>
+    withTempDirectory((root) => {
+      expect(() => resolveTestProcessPlan(root)).toThrow(ValidationCliError);
+      expect(() => resolveTestProcessPlan(root)).toThrow(
+        'No supported StellarForge test workflow',
+      );
+
+      writeFileSync(join(root, 'package.json'), '{not-json');
+      expect(() => resolveTestProcessPlan(root)).toThrow('not valid JSON');
+
+      writeFileSync(
+        join(root, 'package.json'),
+        JSON.stringify({ scripts: { start: 'node app.js' } }),
+      );
+      expect(() => resolveTestProcessPlan(root)).toThrow(
+        'does not define a test script',
+      );
+    }));
+});