diff --git a/crates/aiken-lang/src/parser/error.rs b/crates/aiken-lang/src/parser/error.rs
index 4c8ff215..9308ca42 100644
--- a/crates/aiken-lang/src/parser/error.rs
+++ b/crates/aiken-lang/src/parser/error.rs
@@ -30,7 +30,7 @@ impl ParseError {
 
     pub fn invalid_assignment_right_hand_side(span: Span) -> Self {
         Self {
-            kind: ErrorKind::InvalidAssignmentRightHandSide,
+            kind: ErrorKind::UnfinishedAssignmentRightHandSide,
             span,
             while_parsing: None,
             expected: HashSet::new(),
@@ -173,7 +173,7 @@ pub enum ErrorKind {
         hint: Option<String>,
     },
 
-    #[error("I discovered an invalid assignment.")]
+    #[error("I discovered an unfinished assignment.")]
     #[diagnostic(
         help(
             "{} and {} bindings must be followed by a valid expression.",
@@ -181,7 +181,7 @@ pub enum ErrorKind {
             "expect".if_supports_color(Stdout, |s| s.yellow()),
         ),
     )]
-    InvalidAssignmentRightHandSide,
+    UnfinishedAssignmentRightHandSide,
 
     #[error("I tripped over a {}", fmt_curve_type(.curve))]
     PointNotOnCurve { curve: CurveType },
diff --git a/crates/aiken-lang/src/parser/expr/assignment.rs b/crates/aiken-lang/src/parser/expr/assignment.rs
index 2ebc6887..30f8fbf5 100644
--- a/crates/aiken-lang/src/parser/expr/assignment.rs
+++ b/crates/aiken-lang/src/parser/expr/assignment.rs
@@ -94,4 +94,42 @@ mod tests {
     fn expect_trace_if_false() {
         assert_expr!("expect foo?");
     }
+
+    #[test]
+    fn expect_unfinished_let() {
+        assert_expr!(
+            "
+            let a =
+            // foo
+            let b = 42
+            "
+        );
+    }
+
+    #[test]
+    fn expect_let_in_let() {
+        assert_expr!("let a = { let b = 42 }");
+    }
+
+    #[test]
+    fn expect_let_in_let_return() {
+        assert_expr!(
+            "
+            let a = {
+              let b = 42
+              b
+            }
+            "
+        );
+    }
+
+    #[test]
+    fn expect_let_in_let_parens() {
+        assert_expr!("let a = ( let b = 42 )");
+    }
+
+    #[test]
+    fn expect_expect_let() {
+        assert_expr!("expect { let a = 42 } = foo");
+    }
 }
diff --git a/crates/aiken-lang/src/parser/expr/snapshots/expect_expect_let.snap b/crates/aiken-lang/src/parser/expr/snapshots/expect_expect_let.snap
new file mode 100644
index 00000000..2f2b1431
--- /dev/null
+++ b/crates/aiken-lang/src/parser/expr/snapshots/expect_expect_let.snap
@@ -0,0 +1,40 @@
+---
+source: crates/aiken-lang/src/parser/expr/assignment.rs
+description: "Code:\n\nexpect { let a = 42 } = foo"
+---
+Assignment {
+    location: 0..21,
+    value: Sequence {
+        location: 7..21,
+        expressions: [
+            Assignment {
+                location: 9..19,
+                value: UInt {
+                    location: 17..19,
+                    value: "42",
+                    base: Decimal {
+                        numeric_underscore: false,
+                    },
+                },
+                pattern: Var {
+                    location: 13..14,
+                    name: "a",
+                },
+                kind: Let,
+                annotation: None,
+            },
+        ],
+    },
+    pattern: Constructor {
+        is_record: false,
+        location: 0..21,
+        name: "True",
+        arguments: [],
+        module: None,
+        constructor: (),
+        with_spread: false,
+        tipo: (),
+    },
+    kind: Expect,
+    annotation: None,
+}
diff --git a/crates/aiken-lang/src/parser/expr/snapshots/expect_let_in_let.snap b/crates/aiken-lang/src/parser/expr/snapshots/expect_let_in_let.snap
new file mode 100644
index 00000000..feaa148b
--- /dev/null
+++ b/crates/aiken-lang/src/parser/expr/snapshots/expect_let_in_let.snap
@@ -0,0 +1,34 @@
+---
+source: crates/aiken-lang/src/parser/expr/assignment.rs
+description: "Code:\n\nlet a = { let b = 42 }"
+---
+Assignment {
+    location: 0..22,
+    value: Sequence {
+        location: 8..22,
+        expressions: [
+            Assignment {
+                location: 10..20,
+                value: UInt {
+                    location: 18..20,
+                    value: "42",
+                    base: Decimal {
+                        numeric_underscore: false,
+                    },
+                },
+                pattern: Var {
+                    location: 14..15,
+                    name: "b",
+                },
+                kind: Let,
+                annotation: None,
+            },
+        ],
+    },
+    pattern: Var {
+        location: 4..5,
+        name: "a",
+    },
+    kind: Let,
+    annotation: None,
+}
diff --git a/crates/aiken-lang/src/parser/expr/snapshots/expect_let_in_let_parens.snap b/crates/aiken-lang/src/parser/expr/snapshots/expect_let_in_let_parens.snap
new file mode 100644
index 00000000..250c033a
--- /dev/null
+++ b/crates/aiken-lang/src/parser/expr/snapshots/expect_let_in_let_parens.snap
@@ -0,0 +1,15 @@
+---
+source: crates/aiken-lang/src/parser/expr/assignment.rs
+description: "Invalid code (parse error):\n\nlet a = ( let b = 42 )"
+---
+[
+    ParseError {
+        kind: UnfinishedAssignmentRightHandSide,
+        span: 0..22,
+        while_parsing: None,
+        expected: {},
+        label: Some(
+            "invalid assignment right-hand side",
+        ),
+    },
+]
diff --git a/crates/aiken-lang/src/parser/expr/snapshots/expect_let_in_let_return.snap b/crates/aiken-lang/src/parser/expr/snapshots/expect_let_in_let_return.snap
new file mode 100644
index 00000000..0d11cf5f
--- /dev/null
+++ b/crates/aiken-lang/src/parser/expr/snapshots/expect_let_in_let_return.snap
@@ -0,0 +1,38 @@
+---
+source: crates/aiken-lang/src/parser/expr/assignment.rs
+description: "Code:\n\nlet a = {\n  let b = 42\n  b\n}\n"
+---
+Assignment {
+    location: 0..28,
+    value: Sequence {
+        location: 12..26,
+        expressions: [
+            Assignment {
+                location: 12..22,
+                value: UInt {
+                    location: 20..22,
+                    value: "42",
+                    base: Decimal {
+                        numeric_underscore: false,
+                    },
+                },
+                pattern: Var {
+                    location: 16..17,
+                    name: "b",
+                },
+                kind: Let,
+                annotation: None,
+            },
+            Var {
+                location: 25..26,
+                name: "b",
+            },
+        ],
+    },
+    pattern: Var {
+        location: 4..5,
+        name: "a",
+    },
+    kind: Let,
+    annotation: None,
+}
diff --git a/crates/aiken-lang/src/parser/expr/snapshots/expect_unfinished_let.snap b/crates/aiken-lang/src/parser/expr/snapshots/expect_unfinished_let.snap
new file mode 100644
index 00000000..2a9b3c48
--- /dev/null
+++ b/crates/aiken-lang/src/parser/expr/snapshots/expect_unfinished_let.snap
@@ -0,0 +1,15 @@
+---
+source: crates/aiken-lang/src/parser/expr/assignment.rs
+description: "Invalid code (parse error):\n\nlet a =\n// foo\nlet b = 42\n"
+---
+[
+    ParseError {
+        kind: UnfinishedAssignmentRightHandSide,
+        span: 0..25,
+        while_parsing: None,
+        expected: {},
+        label: Some(
+            "invalid assignment right-hand side",
+        ),
+    },
+]
diff --git a/crates/aiken-lang/src/parser/utils.rs b/crates/aiken-lang/src/parser/utils.rs
index 75d63e92..08853bd4 100644
--- a/crates/aiken-lang/src/parser/utils.rs
+++ b/crates/aiken-lang/src/parser/utils.rs
@@ -28,15 +28,28 @@ macro_rules! assert_expr {
 
         let stream = chumsky::Stream::from_iter($crate::ast::Span::create(tokens.len(), 1), tokens.into_iter());
 
-        let result = $crate::parser::expr::sequence().parse(stream).unwrap();
+        let result = $crate::parser::expr::sequence().parse(stream);
 
-        insta::with_settings!({
-            description => concat!("Code:\n\n", indoc::indoc! { $code }),
-            prepend_module_to_snapshot => false,
-            omit_expression => true
-        }, {
-            insta::assert_debug_snapshot!(result);
-        });
+        match result {
+            Ok(expr) => {
+                insta::with_settings!({
+                    description => concat!("Code:\n\n", indoc::indoc! { $code }),
+                    prepend_module_to_snapshot => false,
+                    omit_expression => true
+                }, {
+                    insta::assert_debug_snapshot!(expr);
+                })
+            },
+            Err(err) => {
+                insta::with_settings!({
+                    description => concat!("Invalid code (parse error):\n\n", indoc::indoc! { $code }),
+                    prepend_module_to_snapshot => false,
+                    omit_expression => true
+                }, {
+                    insta::assert_debug_snapshot!(err);
+                })
+            }
+        }
     };
 }
 
diff --git a/examples/acceptance_tests/092/aiken.lock b/examples/acceptance_tests/092/aiken.lock
new file mode 100644
index 00000000..6e350cda
--- /dev/null
+++ b/examples/acceptance_tests/092/aiken.lock
@@ -0,0 +1,7 @@
+# This file was generated by Aiken
+# You typically do not need to edit this file
+
+requirements = []
+packages = []
+
+[etags]
diff --git a/examples/acceptance_tests/092/aiken.toml b/examples/acceptance_tests/092/aiken.toml
new file mode 100644
index 00000000..e1606480
--- /dev/null
+++ b/examples/acceptance_tests/092/aiken.toml
@@ -0,0 +1,2 @@
+name = "aiken-lang/acceptance_test_092"
+version = "0.0.0"
diff --git a/examples/acceptance_tests/092/lib/foo.ak b/examples/acceptance_tests/092/lib/foo.ak
new file mode 100644
index 00000000..81ef9e41
--- /dev/null
+++ b/examples/acceptance_tests/092/lib/foo.ak
@@ -0,0 +1,41 @@
+test foo_1() {
+  let a = {
+    let b = 42
+    b
+  }
+
+  a == 42
+}
+
+test foo_2() {
+  expect Some(a) = {
+    let b = 42
+    Some(b)
+  }
+
+  a == 42
+}
+
+test foo_3() {
+  let c = Some(42)
+
+  let a = {
+    expect Some(b) = c
+    b
+  }
+
+  a == 42
+}
+
+test foo_4() {
+  let a = {
+    let b = 2
+    let c = {
+      let d = 14
+      d * b
+    }
+    c + 14
+  }
+
+  a == 42
+}
diff --git a/examples/acceptance_tests/092/plutus.json b/examples/acceptance_tests/092/plutus.json
new file mode 100644
index 00000000..a6a24507
--- /dev/null
+++ b/examples/acceptance_tests/092/plutus.json
@@ -0,0 +1,39 @@
+{
+  "preamble": {
+    "title": "aiken-lang/acceptance_test_090",
+    "version": "0.0.0",
+    "plutusVersion": "v2",
+    "compiler": {
+      "name": "Aiken",
+      "version": "v1.0.21-alpha+9f263c4"
+    }
+  },
+  "validators": [
+    {
+      "title": "foo.spend",
+      "datum": {
+        "title": "datum",
+        "schema": {
+          "$ref": "#/definitions/Int"
+        }
+      },
+      "redeemer": {
+        "title": "_redeemer",
+        "schema": {
+          "$ref": "#/definitions/Data"
+        }
+      },
+      "compiledCode": "583f010000322223253330053370e00290487777c9cfdde5c8f27bf4c1637fc55b5eeef7d8c4d9e0d4454967ff7d6e7ee6e242eb60c6318a4c26cac6eb400d5cd1",
+      "hash": "d18aa035514acb988a34d33fc246420c5b0eca4f3f947ce95e294447"
+    }
+  ],
+  "definitions": {
+    "Data": {
+      "title": "Data",
+      "description": "Any Plutus data."
+    },
+    "Int": {
+      "dataType": "integer"
+    }
+  }
+}
\ No newline at end of file