diff --git a/esphome/components/esp32/gpio.py b/esphome/components/esp32/gpio.py
index 5819943f37..6c3fa92fcd 100644
--- a/esphome/components/esp32/gpio.py
+++ b/esphome/components/esp32/gpio.py
@@ -107,7 +107,7 @@ def validate_gpio_pin(value):
     value = _translate_pin(value)
     variant = CORE.data[KEY_ESP32][KEY_VARIANT]
     if variant not in _esp32_validations:
-        raise cv.Invalid("Unsupported ESP32 variant {variant}")
+        raise cv.Invalid(f"Unsupported ESP32 variant {variant}")
 
     return _esp32_validations[variant].pin_validation(value)
 
@@ -121,7 +121,7 @@ def validate_supports(value):
     is_pulldown = mode[CONF_PULLDOWN]
     variant = CORE.data[KEY_ESP32][KEY_VARIANT]
     if variant not in _esp32_validations:
-        raise cv.Invalid("Unsupported ESP32 variant {variant}")
+        raise cv.Invalid(f"Unsupported ESP32 variant {variant}")
 
     if is_open_drain and not is_output:
         raise cv.Invalid(