diff --git a/esphome/components/esp32_ble_client/ble_characteristic.cpp b/esphome/components/esp32_ble_client/ble_characteristic.cpp
index 2fd7fe9871..8a3d313303 100644
--- a/esphome/components/esp32_ble_client/ble_characteristic.cpp
+++ b/esphome/components/esp32_ble_client/ble_characteristic.cpp
@@ -6,8 +6,7 @@
 
 #ifdef USE_ESP32
 
-namespace esphome {
-namespace esp32_ble_client {
+namespace esphome::esp32_ble_client {
 
 static const char *const TAG = "esp32_ble_client";
 
@@ -93,7 +92,6 @@ esp_err_t BLECharacteristic::write_value(uint8_t *new_val, int16_t new_val_size)
   return write_value(new_val, new_val_size, ESP_GATT_WRITE_TYPE_NO_RSP);
 }
 
-}  // namespace esp32_ble_client
-}  // namespace esphome
+}  // namespace esphome::esp32_ble_client
 
 #endif  // USE_ESP32
diff --git a/esphome/components/esp32_ble_client/ble_characteristic.h b/esphome/components/esp32_ble_client/ble_characteristic.h
index a014788e65..d55e69f47a 100644
--- a/esphome/components/esp32_ble_client/ble_characteristic.h
+++ b/esphome/components/esp32_ble_client/ble_characteristic.h
@@ -8,8 +8,7 @@
 
 #include <vector>
 
-namespace esphome {
-namespace esp32_ble_client {
+namespace esphome::esp32_ble_client {
 
 namespace espbt = esphome::esp32_ble_tracker;
 
@@ -33,7 +32,6 @@ class BLECharacteristic {
   BLEService *service;
 };
 
-}  // namespace esp32_ble_client
-}  // namespace esphome
+}  // namespace esphome::esp32_ble_client
 
 #endif  // USE_ESP32
diff --git a/esphome/components/esp32_ble_client/ble_client_base.cpp b/esphome/components/esp32_ble_client/ble_client_base.cpp
index f47642944b..5b433c2b97 100644
--- a/esphome/components/esp32_ble_client/ble_client_base.cpp
+++ b/esphome/components/esp32_ble_client/ble_client_base.cpp
@@ -8,8 +8,7 @@
 #include <esp_gap_ble_api.h>
 #include <esp_gatt_defs.h>
 
-namespace esphome {
-namespace esp32_ble_client {
+namespace esphome::esp32_ble_client {
 
 static const char *const TAG = "esp32_ble_client";
 
@@ -696,7 +695,6 @@ BLEDescriptor *BLEClientBase::get_descriptor(uint16_t handle) {
   return nullptr;
 }
 
-}  // namespace esp32_ble_client
-}  // namespace esphome
+}  // namespace esphome::esp32_ble_client
 
 #endif  // USE_ESP32
diff --git a/esphome/components/esp32_ble_client/ble_client_base.h b/esphome/components/esp32_ble_client/ble_client_base.h
index 93260b1c15..d6a196ff9f 100644
--- a/esphome/components/esp32_ble_client/ble_client_base.h
+++ b/esphome/components/esp32_ble_client/ble_client_base.h
@@ -16,8 +16,7 @@
 #include <esp_gatt_common_api.h>
 #include <esp_gattc_api.h>
 
-namespace esphome {
-namespace esp32_ble_client {
+namespace esphome::esp32_ble_client {
 
 namespace espbt = esphome::esp32_ble_tracker;
 
@@ -130,7 +129,6 @@ class BLEClientBase : public espbt::ESPBTClient, public Component {
   void restore_medium_conn_params_();
 };
 
-}  // namespace esp32_ble_client
-}  // namespace esphome
+}  // namespace esphome::esp32_ble_client
 
 #endif  // USE_ESP32
diff --git a/esphome/components/esp32_ble_client/ble_descriptor.h b/esphome/components/esp32_ble_client/ble_descriptor.h
index c05430144f..015a1243ed 100644
--- a/esphome/components/esp32_ble_client/ble_descriptor.h
+++ b/esphome/components/esp32_ble_client/ble_descriptor.h
@@ -4,8 +4,7 @@
 
 #include "esphome/components/esp32_ble_tracker/esp32_ble_tracker.h"
 
-namespace esphome {
-namespace esp32_ble_client {
+namespace esphome::esp32_ble_client {
 
 namespace espbt = esphome::esp32_ble_tracker;
 
@@ -19,7 +18,6 @@ class BLEDescriptor {
   BLECharacteristic *characteristic;
 };
 
-}  // namespace esp32_ble_client
-}  // namespace esphome
+}  // namespace esphome::esp32_ble_client
 
 #endif  // USE_ESP32
diff --git a/esphome/components/esp32_ble_client/ble_service.cpp b/esphome/components/esp32_ble_client/ble_service.cpp
index b22d2a1788..0defefd6ac 100644
--- a/esphome/components/esp32_ble_client/ble_service.cpp
+++ b/esphome/components/esp32_ble_client/ble_service.cpp
@@ -5,8 +5,7 @@
 
 #ifdef USE_ESP32
 
-namespace esphome {
-namespace esp32_ble_client {
+namespace esphome::esp32_ble_client {
 
 static const char *const TAG = "esp32_ble_client";
 
@@ -71,7 +70,6 @@ void BLEService::parse_characteristics() {
   }
 }
 
-}  // namespace esp32_ble_client
-}  // namespace esphome
+}  // namespace esphome::esp32_ble_client
 
 #endif  // USE_ESP32
diff --git a/esphome/components/esp32_ble_client/ble_service.h b/esphome/components/esp32_ble_client/ble_service.h
index 41fc3e838b..1b8b5a36dc 100644
--- a/esphome/components/esp32_ble_client/ble_service.h
+++ b/esphome/components/esp32_ble_client/ble_service.h
@@ -8,8 +8,7 @@
 
 #include <vector>
 
-namespace esphome {
-namespace esp32_ble_client {
+namespace esphome::esp32_ble_client {
 
 namespace espbt = esphome::esp32_ble_tracker;
 
@@ -30,7 +29,6 @@ class BLEService {
   BLECharacteristic *get_characteristic(uint16_t uuid);
 };
 
-}  // namespace esp32_ble_client
-}  // namespace esphome
+}  // namespace esphome::esp32_ble_client
 
 #endif  // USE_ESP32