diff --git a/esphome/components/cse7766/sensor.py b/esphome/components/cse7766/sensor.py
index ecb59c4b5f..b5b11a661e 100644
--- a/esphome/components/cse7766/sensor.py
+++ b/esphome/components/cse7766/sensor.py
@@ -79,7 +79,7 @@ CONFIG_SCHEMA = cv.Schema(
     }
 ).extend(uart.UART_DEVICE_SCHEMA)
 FINAL_VALIDATE_SCHEMA = uart.final_validate_device_schema(
-    "cse7766", baud_rate=4800, require_rx=True
+    "cse7766", baud_rate=4800, parity="EVEN", require_rx=True
 )
 
 
diff --git a/tests/components/cse7766/test.esp32-ard.yaml b/tests/components/cse7766/test.esp32-ard.yaml
index f94cd0f7d8..5542b52824 100644
--- a/tests/components/cse7766/test.esp32-ard.yaml
+++ b/tests/components/cse7766/test.esp32-ard.yaml
@@ -5,6 +5,7 @@ uart:
     rx_pin:
       number: 16
     baud_rate: 4800
+    parity: EVEN
 
 sensor:
   - platform: cse7766
diff --git a/tests/components/cse7766/test.esp32-c3-ard.yaml b/tests/components/cse7766/test.esp32-c3-ard.yaml
index 432cc0a80e..d27c9d4463 100644
--- a/tests/components/cse7766/test.esp32-c3-ard.yaml
+++ b/tests/components/cse7766/test.esp32-c3-ard.yaml
@@ -5,6 +5,7 @@ uart:
     rx_pin:
       number: 5
     baud_rate: 4800
+    parity: EVEN
 
 sensor:
   - platform: cse7766
diff --git a/tests/components/cse7766/test.esp32-c3-idf.yaml b/tests/components/cse7766/test.esp32-c3-idf.yaml
index 432cc0a80e..d27c9d4463 100644
--- a/tests/components/cse7766/test.esp32-c3-idf.yaml
+++ b/tests/components/cse7766/test.esp32-c3-idf.yaml
@@ -5,6 +5,7 @@ uart:
     rx_pin:
       number: 5
     baud_rate: 4800
+    parity: EVEN
 
 sensor:
   - platform: cse7766
diff --git a/tests/components/cse7766/test.esp32-idf.yaml b/tests/components/cse7766/test.esp32-idf.yaml
index f94cd0f7d8..5542b52824 100644
--- a/tests/components/cse7766/test.esp32-idf.yaml
+++ b/tests/components/cse7766/test.esp32-idf.yaml
@@ -5,6 +5,7 @@ uart:
     rx_pin:
       number: 16
     baud_rate: 4800
+    parity: EVEN
 
 sensor:
   - platform: cse7766
diff --git a/tests/components/cse7766/test.esp8266-ard.yaml b/tests/components/cse7766/test.esp8266-ard.yaml
index 432cc0a80e..d27c9d4463 100644
--- a/tests/components/cse7766/test.esp8266-ard.yaml
+++ b/tests/components/cse7766/test.esp8266-ard.yaml
@@ -5,6 +5,7 @@ uart:
     rx_pin:
       number: 5
     baud_rate: 4800
+    parity: EVEN
 
 sensor:
   - platform: cse7766
diff --git a/tests/components/cse7766/test.rp2040-ard.yaml b/tests/components/cse7766/test.rp2040-ard.yaml
index 432cc0a80e..d27c9d4463 100644
--- a/tests/components/cse7766/test.rp2040-ard.yaml
+++ b/tests/components/cse7766/test.rp2040-ard.yaml
@@ -5,6 +5,7 @@ uart:
     rx_pin:
       number: 5
     baud_rate: 4800
+    parity: EVEN
 
 sensor:
   - platform: cse7766