diff --git a/boards/nordic/nrf54l20pdk/nrf54l20pdk_nrf54l20_cpuapp.yaml b/boards/nordic/nrf54l20pdk/nrf54l20pdk_nrf54l20_cpuapp.yaml
index d11ea0d869f..33e82a5a957 100644
--- a/boards/nordic/nrf54l20pdk/nrf54l20pdk_nrf54l20_cpuapp.yaml
+++ b/boards/nordic/nrf54l20pdk/nrf54l20pdk_nrf54l20_cpuapp.yaml
@@ -15,3 +15,4 @@ flash: 449
 supported:
   - counter
   - gpio
+  - i2c
diff --git a/tests/boards/nrf/i2c/i2c_slave/testcase.yaml b/tests/boards/nrf/i2c/i2c_slave/testcase.yaml
index 6a63242ee25..03ae3a39c4c 100644
--- a/tests/boards/nrf/i2c/i2c_slave/testcase.yaml
+++ b/tests/boards/nrf/i2c/i2c_slave/testcase.yaml
@@ -15,5 +15,6 @@ tests:
       - nrf52840dk/nrf52840
       - nrf5340dk/nrf5340/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54h20dk/nrf54h20/cpuapp
       - nrf54h20dk/nrf54h20/cpuppr