diff --git a/exercises/practice/flower-field/.meta/tests.toml b/exercises/practice/flower-field/.meta/tests.toml
index c2b24fda..965ba8fd 100644
--- a/exercises/practice/flower-field/.meta/tests.toml
+++ b/exercises/practice/flower-field/.meta/tests.toml
@@ -44,3 +44,6 @@ description = "cross"
 
 [dd9d4ca8-9e68-4f78-a677-a2a70fd7a7b8]
 description = "large garden"
+
+[6e4ac13a-3e43-4728-a2e3-3551d4b1a996]
+description = "multiple adjacent flowers"
diff --git a/exercises/practice/flower-field/tests/flower_field.cairo b/exercises/practice/flower-field/tests/flower_field.cairo
index 59f1a57b..ba2a6ff7 100644
--- a/exercises/practice/flower-field/tests/flower_field.cairo
+++ b/exercises/practice/flower-field/tests/flower_field.cairo
@@ -188,3 +188,12 @@ fn large_garden() {
     let actual = annotate(input.span());
     assert_eq!(actual, expected);
 }
+
+#[test]
+#[ignore]
+fn multiple_adjacent_flowers() {
+    let input = array![" ** "];
+    let expected = array!["1**1"];
+    let actual = annotate(input.span());
+    assert_eq!(actual, expected);
+}
diff --git a/exercises/practice/isbn-verifier/.meta/tests.toml b/exercises/practice/isbn-verifier/.meta/tests.toml
index 6d5a8459..17e18d47 100644
--- a/exercises/practice/isbn-verifier/.meta/tests.toml
+++ b/exercises/practice/isbn-verifier/.meta/tests.toml
@@ -30,6 +30,12 @@ description = "invalid character in isbn is not treated as zero"
 [28025280-2c39-4092-9719-f3234b89c627]
 description = "X is only valid as a check digit"
 
+[8005b57f-f194-44ee-88d2-a77ac4142591]
+description = "only one check digit is allowed"
+
+[fdb14c99-4cf8-43c5-b06d-eb1638eff343]
+description = "X is not substituted by the value 10"
+
 [f6294e61-7e79-46b3-977b-f48789a4945b]
 description = "valid isbn without separating dashes"
 
diff --git a/exercises/practice/isbn-verifier/tests/isbn_verifier.cairo b/exercises/practice/isbn-verifier/tests/isbn_verifier.cairo
index cf3e3368..ecd0d4ea 100644
--- a/exercises/practice/isbn-verifier/tests/isbn_verifier.cairo
+++ b/exercises/practice/isbn-verifier/tests/isbn_verifier.cairo
@@ -41,6 +41,18 @@ fn x_is_only_valid_as_a_check_digit() {
     assert!(!is_valid("3-598-2X507-9"));
 }
 
+#[test]
+#[ignore]
+fn only_one_check_digit_is_allowed() {
+    assert!(!is_valid("3-598-21508-96"));
+}
+
+#[test]
+#[ignore]
+fn x_is_not_substituted_by_the_value_10() {
+    assert!(!is_valid("3-598-2X507-5"));
+}
+
 #[test]
 #[ignore]
 fn valid_isbn_without_separating_dashes() {