diff --git a/examples/.gitignore b/examples/.gitignore
new file mode 100644
index 0000000000..54d0b1f5ff
--- /dev/null
+++ b/examples/.gitignore
@@ -0,0 +1,6 @@
+/*/core
+/*/core.*
+!/*/core.c
+!/*/core.h
+!/*/core.md
+!/*/core.txt
diff --git a/tests/.gitignore b/tests/.gitignore
new file mode 100644
index 0000000000..54d0b1f5ff
--- /dev/null
+++ b/tests/.gitignore
@@ -0,0 +1,6 @@
+/*/core
+/*/core.*
+!/*/core.c
+!/*/core.h
+!/*/core.md
+!/*/core.txt
diff --git a/tests/periph_gpio_ll/core b/tests/periph_gpio_ll/core
deleted file mode 100644
index 06e57df8e5..0000000000
Binary files a/tests/periph_gpio_ll/core and /dev/null differ