diff --git a/app/tests/momentary-layer/behavior_keymap.dtsi b/app/tests/momentary-layer/behavior_keymap.dtsi
new file mode 100644
index 00000000..34c445cf
--- /dev/null
+++ b/app/tests/momentary-layer/behavior_keymap.dtsi
@@ -0,0 +1,28 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan-mock.h>
+
+/ {
+	keymap {
+		compatible = "zmk,keymap";
+		label ="Default keymap";
+
+		default_layer {
+			bindings = <
+				&kp B &mo 1
+				&kp D &kp G>;
+		};
+
+		lower_layer {
+			bindings = <
+				&cp M_NEXT &trans
+				&kp L  &kp J>;
+		};
+
+		raise_layer {
+			bindings = <
+				&kp W &kp U
+				&kp X  &kp M>;
+		};
+	};
+};
diff --git a/app/tests/momentary-layer/early-key-release/events.patterns b/app/tests/momentary-layer/early-key-release/events.patterns
new file mode 100644
index 00000000..bd7b4880
--- /dev/null
+++ b/app/tests/momentary-layer/early-key-release/events.patterns
@@ -0,0 +1,2 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
\ No newline at end of file
diff --git a/app/tests/momentary-layer/early-key-release/keycode_events.snapshot b/app/tests/momentary-layer/early-key-release/keycode_events.snapshot
new file mode 100644
index 00000000..474eef7a
--- /dev/null
+++ b/app/tests/momentary-layer/early-key-release/keycode_events.snapshot
@@ -0,0 +1,4 @@
+kp_pressed: usage_page 0x07 keycode 0x05
+mo_pressed: position 1 layer 1
+kp_released: usage_page 0x07 keycode 0x05
+mo_released: position 1 layer 1
diff --git a/app/tests/momentary-layer/early-key-release/native_posix.keymap b/app/tests/momentary-layer/early-key-release/native_posix.keymap
new file mode 100644
index 00000000..a58ad26c
--- /dev/null
+++ b/app/tests/momentary-layer/early-key-release/native_posix.keymap
@@ -0,0 +1,8 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan-mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <ZMK_MOCK_PRESS(0,0,0) ZMK_MOCK_PRESS(0,1,100) ZMK_MOCK_RELEASE(0,0,200) ZMK_MOCK_RELEASE(0,1,300)>;
+};
\ No newline at end of file
diff --git a/app/tests/momentary-layer/normal/events.patterns b/app/tests/momentary-layer/normal/events.patterns
new file mode 100644
index 00000000..bd7b4880
--- /dev/null
+++ b/app/tests/momentary-layer/normal/events.patterns
@@ -0,0 +1,2 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
\ No newline at end of file
diff --git a/app/tests/momentary-layer/normal/keycode_events.snapshot b/app/tests/momentary-layer/normal/keycode_events.snapshot
new file mode 100644
index 00000000..f3fca66f
--- /dev/null
+++ b/app/tests/momentary-layer/normal/keycode_events.snapshot
@@ -0,0 +1,4 @@
+mo_pressed: position 1 layer 1
+kp_pressed: usage_page 0x0c keycode 0xb5
+kp_released: usage_page 0x0c keycode 0xb5
+mo_released: position 1 layer 1
\ No newline at end of file
diff --git a/app/tests/momentary-layer/normal/native_posix.keymap b/app/tests/momentary-layer/normal/native_posix.keymap
new file mode 100644
index 00000000..1b678585
--- /dev/null
+++ b/app/tests/momentary-layer/normal/native_posix.keymap
@@ -0,0 +1,8 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan-mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <ZMK_MOCK_PRESS(0,1,0) ZMK_MOCK_PRESS(0,0,100) ZMK_MOCK_RELEASE(0,0,200) ZMK_MOCK_RELEASE(0,1,300)>;
+};
\ No newline at end of file