diff --git a/snippets/all_unique.md b/snippets/all_unique.md
index 020e65f2e..ea4177beb 100644
--- a/snippets/all_unique.md
+++ b/snippets/all_unique.md
@@ -11,6 +11,7 @@ def all_unique(lst):
 
 ``` python
 x = [1,2,3,4,5,6]
-all_unique(x) # result
-True
+y = [1,2,2,3,4,5]
+all_unique(x) # True
+all_unique(y) # False
 ```
\ No newline at end of file
diff --git a/snippets/has_duplicates.md b/snippets/has_duplicates.md
index 2c0f65f5e..3a7535919 100644
--- a/snippets/has_duplicates.md
+++ b/snippets/has_duplicates.md
@@ -11,6 +11,7 @@ def has_duplicates(lst):
 
 ``` python
 x = [1,2,3,4,5,5]
-has_duplicates(x) # result
-True
+y = [1,2,3,4,5]
+has_duplicates(x) # True
+has_duplicates(y) # False
 ```
diff --git a/snippets/keys_only.md b/snippets/keys_only.md
index 7c2a3e478..1dc5a4d0d 100644
--- a/snippets/keys_only.md
+++ b/snippets/keys_only.md
@@ -18,6 +18,5 @@ ages = {
      "Isabel": 11,
      "Anna": 9,
 }
-keys_only(ages) # result
-['Peter', 'Isabel', 'Anna']
+keys_only(ages) # ['Peter', 'Isabel', 'Anna']
 ```
\ No newline at end of file
diff --git a/snippets/values_only.md b/snippets/values_only.md
index e326dd9a9..ddda0731d 100644
--- a/snippets/values_only.md
+++ b/snippets/values_only.md
@@ -18,6 +18,5 @@ ages = {
      "Isabel": 11,
      "Anna": 9,
 }
-values_only(ages) # result
-[10, 11, 9]
+values_only(ages) # [10, 11, 9]
 ```
\ No newline at end of file
diff --git a/test/keys_only/keys_only.py b/test/keys_only/keys_only.py
index e69de29bb..5f97a2265 100644
--- a/test/keys_only/keys_only.py
+++ b/test/keys_only/keys_only.py
@@ -0,0 +1,5 @@
+def keys_only(dict):
+    lst = []
+    for k, v in dict.items():
+        lst.append(k)
+    return lst
\ No newline at end of file