diff --git a/content/testing.md b/content/testing.md
index 7a63bd9..c0c1054 100644
--- a/content/testing.md
+++ b/content/testing.md
@@ -8,3 +8,8 @@
 - 15 min: Moving to GitHub Actions
 - 20 min: Exercise
 - 10 min: Where to go from here
+
+Further steps:
+- example-based vs. property-based (hypothesis library)
+- snapshot based testing (syrupy library) -> regression tests
+- mutation testing (mutmut): tests pass -> change a line of code (make a mutant) -> test again and check whether all mutants get "killed"