diff --git a/README.rst b/README.rst
index 9391aa762..f0d994a80 100644
--- a/README.rst
+++ b/README.rst
@@ -1212,8 +1212,6 @@ in `openwisp settings <https://github.com/openwisp/openwisp-monitoring/blob/mast
                BQIDAQAB
                """
            ),
-           # relative to /root directory
-           'rsa_public_key_path' : '/tmp/iperf-public-key.pem',
            'client_options': {
                'port': 5209,
                'udp': {'bitrate': '20M'},
@@ -1353,9 +1351,8 @@ For example, if you want to change only the **port number** of
 +--------------+-------------------------------+
 
 This setting allows you to set whether 
-`iperf check RSA public key <#configure-iperf-check-for-authentication>`_ will be deleted from the path 
-defined in `OPENWISP_MONITORING_IPERF_CHECK_CONFIG <#OPENWISP_MONITORING_IPERF_CHECK_CONFIG>`_
-after successful completion of the check or not.
+`iperf check RSA public key <#configure-iperf-check-for-authentication>`_ 
+will be deleted after successful completion of the check or not.
 
 ``OPENWISP_MONITORING_AUTO_CHARTS``
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/openwisp_monitoring/check/classes/iperf.py b/openwisp_monitoring/check/classes/iperf.py
index dfed79401..7a93c056f 100644
--- a/openwisp_monitoring/check/classes/iperf.py
+++ b/openwisp_monitoring/check/classes/iperf.py
@@ -35,10 +35,6 @@
         'type': 'string',
         'default': '',
     },
-    'rsa_public_key_path': {
-        'type': 'string',
-        'default': '/tmp/iperf-rsa-public.pem',
-    },
     'client_options': {
         'type': 'object',
         'properties': {
@@ -156,9 +152,7 @@ def check(self, store=True):
             password = self._get_param('password', 'password.default')
             key = self._get_param('rsa_public_key', 'rsa_public_key.default')
             rsa_public_key = self._get_compelete_rsa_key(key)
-            rsa_public_key_path = self._get_param(
-                'rsa_public_key_path', 'rsa_public_key_path.default'
-            )
+            rsa_public_key_path = '/tmp/iperf-public-key.pem'
 
             command_tcp = f'echo "{rsa_public_key}" > {rsa_public_key_path} && \
             IPERF3_PASSWORD="{password}" iperf3 -c {server} -p {port} -t {time} \
diff --git a/openwisp_monitoring/check/tests/iperf_test_utils.py b/openwisp_monitoring/check/tests/iperf_test_utils.py
index 6a730f501..97a8a959a 100644
--- a/openwisp_monitoring/check/tests/iperf_test_utils.py
+++ b/openwisp_monitoring/check/tests/iperf_test_utils.py
@@ -832,11 +832,7 @@
 
 iperf3 homepage at: https://software.es.net/iperf/
 Report bugs to:     https://github.com/esnet/iperf
-iperf3: parameter error - you must specify username (max 20 chars), password (max 20 chars) and a path to a valid public rsa client to be used
-
-Keyword arguments:
-argument -- description
-Return: return_description"""
+iperf3: parameter error - you must specify username (max 20 chars), password (max 20 chars) and a path to a valid public rsa client to be used"""
 
 TEST_RSA_KEY = """MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwuEm+iYrfSWJOupy6X3N 
 dxZvUCxvmoL3uoGAs0O0Y32unUQrwcTIxudy38JSuCccD+k2Rf8S4WuZSiTxaoea 
diff --git a/openwisp_monitoring/check/tests/test_iperf.py b/openwisp_monitoring/check/tests/test_iperf.py
index 5296d4073..a9c3a253d 100644
--- a/openwisp_monitoring/check/tests/test_iperf.py
+++ b/openwisp_monitoring/check/tests/test_iperf.py
@@ -90,7 +90,7 @@ def _set_auth_expected_calls(self, dc, org_id, config):
         test_prefix = '-----BEGIN PUBLIC KEY-----\n'
         test_suffix = '\n-----END PUBLIC KEY-----'
         key = config[org_id]['rsa_public_key']
-        rsa_key_path = config[org_id]['rsa_public_key_path']
+        rsa_key_path = '/tmp/iperf-public-key.pem'
 
         self._EXPECTED_COMMAND_CALLS = [
             call(
@@ -172,7 +172,6 @@ def test_iperf_check_params(
             'username': 'openwisp-test-user',
             'password': 'openwisp_pass',
             'rsa_public_key': TEST_RSA_KEY,
-            'rsa_public_key_path': rsa_key_path,
             'client_options': {
                 'port': 6201,
                 'time': 20,
@@ -187,6 +186,7 @@ def test_iperf_check_params(
         username = test_params['username']
         password = test_params['password']
         key = test_params['rsa_public_key']
+        rsa_key_path = '/tmp/iperf-public-key.pem'
         check.params = test_params
         check.save()
         self._EXPECTED_COMMAND_CALLS = [
@@ -367,16 +367,14 @@ def test_iperf_check(self, mock_warn, mock_get_iperf_servers, mock_exec_command)
                 org_id: {
                     'username': 'test',
                     'password': 'testpass',
-                    'rsa_public_key': TEST_RSA_KEY,
-                    'rsa_public_key_path': '/invalid_path/iperf-rsa-public.pem',
+                    'rsa_public_key': 'INVALID_RSA_KEY',
                 }
             }
             with patch.object(app_settings, 'IPERF_CHECK_CONFIG', iperf_config):
-                dir_error = "ash: can't create /invalid_path/iperf-rsa-public.pem: nonexistent directory"
-                mock_exec_command.side_effect = [(dir_error, 1), (PARAM_ERROR, 1)]
+                mock_exec_command.side_effect = [(PARAM_ERROR, 1), (PARAM_ERROR, 1)]
                 EXPECTED_WARN_CALLS = [
                     call(
-                        f'Iperf check failed for "{self.device}", error - {dir_error}'
+                        f'Iperf check failed for "{self.device}", error - {PARAM_ERROR}'
                     ),
                     call(
                         f'Iperf check failed for "{self.device}", error - {PARAM_ERROR}'
@@ -538,7 +536,6 @@ def test_iperf_check_auth_config(
                 'username': 'test',
                 'password': 'testpass',
                 'rsa_public_key': TEST_RSA_KEY,
-                'rsa_public_key_path': '/tmp/test-rsa.pem',
             }
         }
         iperf_conf_wrong_pass = {
@@ -546,7 +543,6 @@ def test_iperf_check_auth_config(
                 'username': 'test',
                 'password': 'wrongpass',
                 'rsa_public_key': TEST_RSA_KEY,
-                'rsa_public_key_path': '/tmp/test-rsa.pem',
             }
         }
         iperf_conf_wrong_user = {
@@ -554,7 +550,6 @@ def test_iperf_check_auth_config(
                 'username': 'wronguser',
                 'password': 'testpass',
                 'rsa_public_key': TEST_RSA_KEY,
-                'rsa_public_key_path': '/tmp/test-rsa.pem',
             }
         }
         auth_error = "test authorization failed"