diff --git a/dev/src/cli/cli.ts b/dev/src/cli/cli.ts
index 8ace3e90a..0bf546efd 100644
--- a/dev/src/cli/cli.ts
+++ b/dev/src/cli/cli.ts
@@ -57,20 +57,9 @@ function parseLogLevel(value: string): string {
   return normalized;
 }
 
-function getLogLevelFromOptions(options: {
-  verbose?: boolean;
-  log_level?: string;
-}) {
-  if (options.verbose) {
-    return LogLevel.DEBUG;
-  }
-
-  if (typeof options.log_level === 'string') {
-    // `??`, not `||`: LogLevel.DEBUG is 0 and would otherwise be discarded.
-    return LOG_LEVEL_MAP.get(options.log_level) ?? LogLevel.INFO;
-  }
-
-  return LogLevel.INFO;
+function getLogLevelFromOptions(options: {log_level?: string}): LogLevel {
+  // `??`, not `||`: LogLevel.DEBUG is 0 and would otherwise be discarded.
+  return LOG_LEVEL_MAP.get(options.log_level ?? 'info') ?? LogLevel.INFO;
 }
 
 function getAbsolutePath(p: string): string {
@@ -135,8 +124,13 @@ const ORIGINS_OPTION = new Option(
 ).default('');
 const VERBOSE_OPTION = new Option(
   '-v, --verbose [boolean]',
-  'Optional. The verbose level of the server',
-).default(false);
+  'Optional. Enable verbose (DEBUG) logging. Shortcut for --log_level debug; an explicitly passed --log_level wins.',
+)
+  // Commander applies an implied value only while the target option sits at
+  // its default, which is the precedence rule the Python SDK gets from
+  // `ctx.get_parameter_source("log_level") == ParameterSource.DEFAULT`.
+  .implies({log_level: 'debug'})
+  .default(false);
 const LOG_LEVEL_OPTION = new Option(
   '--log_level <string>',
   'Optional. The log level of the server',
@@ -557,6 +551,8 @@ export function createProgram(): Command {
     )
     .option('--force', 'Force run skipped tests.')
     .action(async (options: Record<string, string>) => {
+      setAdkCoreLogLevel(getLogLevelFromOptions(options));
+
       runIntegrationTests({
         agentsDir: options['agents_dir'],
         testsDir: options['tests_dir'],
diff --git a/dev/test/cli/cli_test.ts b/dev/test/cli/cli_test.ts
index cd5bdf893..0d24d9eec 100644
--- a/dev/test/cli/cli_test.ts
+++ b/dev/test/cli/cli_test.ts
@@ -348,6 +348,107 @@ describe('CLI Entrypoint', () => {
     });
   });
 
+  describe('option: --verbose', () => {
+    it('lets an explicit level win over a following --verbose', async () => {
+      await parse(['web', '--log_level', 'error', '--verbose']);
+
+      expect(setLogLevel).toHaveBeenCalledWith(LogLevel.ERROR);
+    });
+
+    it('lets an explicit level win over a preceding --verbose', async () => {
+      await parse(['web', '--verbose', '--log_level', 'error']);
+
+      expect(setLogLevel).toHaveBeenCalledWith(LogLevel.ERROR);
+    });
+
+    it('lets an explicit level win even when it equals the default', async () => {
+      await parse(['web', '--log_level', 'info', '--verbose']);
+
+      expect(setLogLevel).toHaveBeenCalledWith(LogLevel.INFO);
+    });
+
+    it('keeps debug when the explicit level also asks for debug', async () => {
+      await parse(['web', '--log_level', 'debug', '--verbose']);
+
+      expect(setLogLevel).toHaveBeenCalledWith(LogLevel.DEBUG);
+    });
+
+    it('lets an explicit level win on api_server', async () => {
+      await parse(['api_server', '--log_level', 'warn', '--verbose']);
+
+      expect(setLogLevel).toHaveBeenCalledWith(LogLevel.WARN);
+    });
+
+    it('lets an explicit level win on run', async () => {
+      await parse(argvFor('run', '--log_level', 'error', '--verbose'));
+
+      expect(setLogLevel).toHaveBeenCalledWith(LogLevel.ERROR);
+      expect(runAgent).toHaveBeenCalled();
+    });
+
+    it.each([
+      [['--verbose'], 'debug'],
+      [['--log_level=error', '--verbose'], 'error'],
+      [[], 'info'],
+    ])(
+      'bakes the level resolved from `%s` into the Cloud Run deploy',
+      async (flags, logLevel) => {
+        await parse(['deploy', 'cloud_run', ...flags]);
+
+        expect(vi.mocked(deployToCloudRun).mock.calls[0][0]).toMatchObject({
+          logLevel,
+        });
+      },
+    );
+
+    it.each(['agent_engine', 'reasoning_engine'])(
+      'bakes debug into `deploy %s --verbose`',
+      async (command) => {
+        await parse(['deploy', command, '--verbose']);
+
+        expect(vi.mocked(deployToAgentEngine).mock.calls[0][0]).toMatchObject({
+          logLevel: 'debug',
+        });
+      },
+    );
+
+    it('lets an explicit level win on deploy agent_engine', async () => {
+      await parse(['deploy', 'agent_engine', '--log_level=warn', '--verbose']);
+
+      expect(vi.mocked(deployToAgentEngine).mock.calls[0][0]).toMatchObject({
+        logLevel: 'warn',
+      });
+    });
+
+    it.each([
+      [[], LogLevel.INFO],
+      [['--verbose'], LogLevel.DEBUG],
+      [['--log_level', 'error', '--verbose'], LogLevel.ERROR],
+    ])(
+      'applies the resolved level on `integration conformance %s`',
+      async (flags, expected) => {
+        await parse(['integration', 'conformance', ...flags]);
+
+        expect(setLogLevel).toHaveBeenCalledWith(expected);
+        expect(runIntegrationTests).toHaveBeenCalled();
+      },
+    );
+
+    it.each(LOG_LEVEL_COMMANDS)(
+      'documents the shortcut and its precedence in `%s` help',
+      (commandPath) => {
+        const help = findCommand(program, commandPath)
+          .helpInformation()
+          .replace(/\s+/g, ' ');
+
+        expect(help).toContain(
+          'Enable verbose (DEBUG) logging. Shortcut for --log_level debug; ' +
+            'an explicitly passed --log_level wins.',
+        );
+      },
+    );
+  });
+
   describe('command: web', () => {
     it('should start AdkApiServer with default options', async () => {
       await parse(['web']);