diff --git a/garde/tests/rules/inner.rs b/garde/tests/rules/inner.rs
index 4eb8975..803ebbe 100644
--- a/garde/tests/rules/inner.rs
+++ b/garde/tests/rules/inner.rs
@@ -26,3 +26,96 @@ fn alphanumeric_invalid() {
         &()
     )
 }
+
+#[derive(Debug, garde::Validate)]
+struct NotNestedOption<'a> {
+    #[garde(inner(alphanumeric))]
+    inner: Option<&'a str>,
+}
+
+#[derive(Debug, garde::Validate)]
+struct NestedSliceInsideOption<'a> {
+    #[garde(inner(inner(alphanumeric)))]
+    inner: Option<&'a [&'a str]>,
+}
+
+#[derive(Debug, garde::Validate)]
+struct DoubleNestedSliceInsideOption<'a> {
+    #[garde(inner(inner(inner(alphanumeric))))]
+    inner: Option<&'a [&'a [&'a str]]>,
+}
+
+#[derive(Debug, garde::Validate)]
+struct OptionInsideSlice<'a> {
+    #[garde(inner(inner(alphanumeric)))]
+    inner: &'a [Option<&'a str>],
+}
+
+#[test]
+fn alphanumeric_some_valid() {
+    util::check_ok(
+        &[NotNestedOption {
+            inner: Some("abcd0123"),
+        }],
+        &(),
+    );
+    util::check_ok(
+        &[NestedSliceInsideOption {
+            inner: Some(&["abcd0123"]),
+        }],
+        &(),
+    );
+    util::check_ok(
+        &[DoubleNestedSliceInsideOption {
+            inner: Some(&[&["abcd0123"]]),
+        }],
+        &(),
+    );
+    util::check_ok(
+        &[OptionInsideSlice {
+            inner: &[Some("abcd0123")],
+        }],
+        &(),
+    )
+}
+
+#[test]
+fn alphanumeric_some_invalid() {
+    util::check_fail!(
+        &[NotNestedOption {
+            inner: Some("!!!!"),
+        }],
+        &(),
+    );
+    util::check_fail!(
+        &[NestedSliceInsideOption {
+            inner: Some(&["!!!!"]),
+        }],
+        &(),
+    );
+    util::check_fail!(
+        &[DoubleNestedSliceInsideOption {
+            inner: Some(&[&["!!!!"]]),
+        }],
+        &(),
+    );
+    util::check_fail!(
+        &[OptionInsideSlice {
+            inner: &[Some("!!!!")],
+        }],
+        &(),
+    )
+}
+
+#[test]
+fn alphanumeric_none_valid() {
+    util::check_ok(&[NotNestedOption { inner: None }], &());
+    util::check_ok(&[NestedSliceInsideOption { inner: None }], &());
+    util::check_ok(&[DoubleNestedSliceInsideOption { inner: None }], &());
+    util::check_ok(
+        &[OptionInsideSlice {
+            inner: &[None, None],
+        }],
+        &(),
+    )
+}
diff --git a/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid-2.snap b/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid-2.snap
new file mode 100644
index 0000000..9a9b892
--- /dev/null
+++ b/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid-2.snap
@@ -0,0 +1,15 @@
+---
+source: garde/tests/./rules/inner.rs
+assertion_line: 90
+expression: snapshot
+---
+NestedSliceInsideOption {
+    inner: Some(
+        [
+            "!!!!",
+        ],
+    ),
+}
+inner[0]: not alphanumeric
+
+
diff --git a/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid-3.snap b/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid-3.snap
new file mode 100644
index 0000000..ec85bff
--- /dev/null
+++ b/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid-3.snap
@@ -0,0 +1,17 @@
+---
+source: garde/tests/./rules/inner.rs
+assertion_line: 96
+expression: snapshot
+---
+DoubleNestedSliceInsideOption {
+    inner: Some(
+        [
+            [
+                "!!!!",
+            ],
+        ],
+    ),
+}
+inner[0][0]: not alphanumeric
+
+
diff --git a/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid-4.snap b/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid-4.snap
new file mode 100644
index 0000000..c85d607
--- /dev/null
+++ b/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid-4.snap
@@ -0,0 +1,15 @@
+---
+source: garde/tests/./rules/inner.rs
+assertion_line: 102
+expression: snapshot
+---
+OptionInsideSlice {
+    inner: [
+        Some(
+            "!!!!",
+        ),
+    ],
+}
+inner[0]: not alphanumeric
+
+
diff --git a/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid.snap b/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid.snap
new file mode 100644
index 0000000..e692b6a
--- /dev/null
+++ b/garde/tests/rules/snapshots/rules__rules__inner__alphanumeric_some_invalid.snap
@@ -0,0 +1,13 @@
+---
+source: garde/tests/./rules/inner.rs
+assertion_line: 84
+expression: snapshot
+---
+NotNestedOption {
+    inner: Some(
+        "!!!!",
+    ),
+}
+inner: not alphanumeric
+
+