diff --git a/esphome/components/weikai/__init__.py b/esphome/components/weikai/__init__.py
index 4c8f7e700d..796423438e 100644
--- a/esphome/components/weikai/__init__.py
+++ b/esphome/components/weikai/__init__.py
@@ -16,6 +16,7 @@ CODEOWNERS = ["@DrCoolZic"]
 AUTO_LOAD = ["uart"]
 
 MULTI_CONF = True
+CONF_DATA_BITS = "data_bits"
 CONF_STOP_BITS = "stop_bits"
 CONF_PARITY = "parity"
 CONF_CRYSTAL = "crystal"
@@ -60,6 +61,7 @@ WKBASE_SCHEMA = cv.Schema(
                 cv.Required(CONF_ID): cv.declare_id(WeikaiChannel),
                 cv.Optional(CONF_CHANNEL, default=0): cv.int_range(min=0, max=3),
                 cv.Required(CONF_BAUD_RATE): cv.int_range(min=1),
+                cv.Optional(CONF_DATA_BITS, default=8): cv.one_of(8, int=True),
                 cv.Optional(CONF_STOP_BITS, default=1): cv.one_of(1, 2, int=True),
                 cv.Optional(CONF_PARITY, default="NONE"): cv.enum(
                     uart.UART_PARITY_OPTIONS, upper=True
diff --git a/tests/components/wk2132_i2c/common.yaml b/tests/components/wk2132_i2c/common.yaml
index f9c8ab756d..942e01aafc 100644
--- a/tests/components/wk2132_i2c/common.yaml
+++ b/tests/components/wk2132_i2c/common.yaml
@@ -17,4 +17,10 @@ wk2132_i2c:
         parity: none
       - id: wk2132_id_1
         channel: 1
-        baud_rate: 19200
+        baud_rate: 9600
+
+# Ensures a sensor doesn't break validation
+sensor:
+  - platform: a02yyuw
+    uart_id: wk2132_id_1
+    id: distance_sensor
diff --git a/tests/components/wk2132_i2c/test.esp32-ard.yaml b/tests/components/wk2132_i2c/test.esp32-ard.yaml
index 3b761d3fc1..94552c5a40 100644
--- a/tests/components/wk2132_i2c/test.esp32-ard.yaml
+++ b/tests/components/wk2132_i2c/test.esp32-ard.yaml
@@ -3,3 +3,4 @@ substitutions:
   sda_pin: GPIO21
 
 <<: !include common.yaml
+
diff --git a/tests/components/wk2132_spi/common.yaml b/tests/components/wk2132_spi/common.yaml
index b21e89120c..a077b36998 100644
--- a/tests/components/wk2132_spi/common.yaml
+++ b/tests/components/wk2132_spi/common.yaml
@@ -18,4 +18,10 @@ wk2132_spi:
         parity: none
       - id: wk2132_spi_id1
         channel: 1
-        baud_rate: 921600
+        baud_rate: 9600
+
+# Ensures a sensor doesn't break validation
+sensor:
+  - platform: a02yyuw
+    uart_id: wk2132_spi_id1
+    id: distance_sensor
diff --git a/tests/components/wk2168_i2c/common.yaml b/tests/components/wk2168_i2c/common.yaml
index fe4689d6db..10463e8abf 100644
--- a/tests/components/wk2168_i2c/common.yaml
+++ b/tests/components/wk2168_i2c/common.yaml
@@ -24,7 +24,13 @@ wk2168_i2c:
         baud_rate: 115200
       - id: id3
         channel: 3
-        baud_rate: 115200
+        baud_rate: 9600
+
+# Ensures a sensor doesn't break validation
+sensor:
+  - platform: a02yyuw
+    uart_id: id3
+    id: distance_sensor
 
 # individual binary_sensor inputs
 binary_sensor:
diff --git a/tests/components/wk2168_spi/common.yaml b/tests/components/wk2168_spi/common.yaml
index 7626e18df6..fb126193fc 100644
--- a/tests/components/wk2168_spi/common.yaml
+++ b/tests/components/wk2168_spi/common.yaml
@@ -24,7 +24,13 @@ wk2168_spi:
         baud_rate: 115200
       - id: id3
         channel: 3
-        baud_rate: 115200
+        baud_rate: 9600
+
+# Ensures a sensor doesn't break validation
+sensor:
+  - platform: a02yyuw
+    uart_id: id3
+    id: distance_sensor
 
 # individual binary_sensor inputs
 binary_sensor:
diff --git a/tests/components/wk2204_i2c/common.yaml b/tests/components/wk2204_i2c/common.yaml
index 80f636c690..70c0f4babf 100644
--- a/tests/components/wk2204_i2c/common.yaml
+++ b/tests/components/wk2204_i2c/common.yaml
@@ -25,4 +25,10 @@ wk2204_i2c:
         parity: none
       - id: wk2204_id_3
         channel: 3
-        baud_rate: 19200
+        baud_rate: 9600
+
+# Ensures a sensor doesn't break validation
+sensor:
+  - platform: a02yyuw
+    uart_id: wk2204_id_3
+    id: distance_sensor
diff --git a/tests/components/wk2204_spi/common.yaml b/tests/components/wk2204_spi/common.yaml
index 3bae9c9a6d..a08cdb906f 100644
--- a/tests/components/wk2204_spi/common.yaml
+++ b/tests/components/wk2204_spi/common.yaml
@@ -26,4 +26,10 @@ wk2204_spi:
         parity: none
       - id: wk2204_spi_id3
         channel: 3
-        baud_rate: 921600
+        baud_rate: 9600
+
+# Ensures a sensor doesn't break validation
+sensor:
+  - platform: a02yyuw
+    uart_id: wk2204_spi_id3
+    id: distance_sensor
diff --git a/tests/components/wk2212_i2c/common.yaml b/tests/components/wk2212_i2c/common.yaml
index 2e891c5520..0759ef8688 100644
--- a/tests/components/wk2212_i2c/common.yaml
+++ b/tests/components/wk2212_i2c/common.yaml
@@ -18,10 +18,16 @@ wk2212_i2c:
         parity: none
       - id: uart_i2c_id1
         channel: 1
-        baud_rate: 115200
+        baud_rate: 9600
         stop_bits: 1
         parity: none
 
+# Ensures a sensor doesn't break validation
+sensor:
+  - platform: a02yyuw
+    uart_id: uart_i2c_id1
+    id: distance_sensor
+
 # individual binary_sensor inputs
 binary_sensor:
   - platform: gpio
diff --git a/tests/components/wk2212_spi/common.yaml b/tests/components/wk2212_spi/common.yaml
index ad9f11d9e8..693d2a9ab2 100644
--- a/tests/components/wk2212_spi/common.yaml
+++ b/tests/components/wk2212_spi/common.yaml
@@ -18,7 +18,13 @@ wk2212_spi:
         parity: none
       - id: id1
         channel: 1
-        baud_rate: 115200
+        baud_rate: 9600
+
+# Ensures a sensor doesn't break validation
+sensor:
+  - platform: a02yyuw
+    uart_id: id1
+    id: distance_sensor
 
 # individual binary_sensor inputs
 binary_sensor:
@@ -55,4 +61,3 @@ switch:
       mode:
         output: true
       inverted: true
-