diff --git a/Cargo.lock b/Cargo.lock
index cf767bf..a7fa288 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1254,9 +1254,6 @@ dependencies = [
 [[package]]
 name = "primitive-data-types"
 version = "0.1.0"
-dependencies = [
- "syntest",
-]
 
 [[package]]
 name = "printing-hello-world"
diff --git a/challenges/primitive-data-types/Cargo.toml b/challenges/primitive-data-types/Cargo.toml
index 219c6fe..7148eaa 100644
--- a/challenges/primitive-data-types/Cargo.toml
+++ b/challenges/primitive-data-types/Cargo.toml
@@ -2,6 +2,3 @@
 name = "primitive-data-types"
 version = "0.1.0"
 edition = "2021"
-
-[dev-dependencies]
-syntest = { version = "0.1.0", path = "../../crates/syntest" }
diff --git a/challenges/primitive-data-types/src/lib.rs b/challenges/primitive-data-types/src/lib.rs
index 65b965d..4cc8d7f 100644
--- a/challenges/primitive-data-types/src/lib.rs
+++ b/challenges/primitive-data-types/src/lib.rs
@@ -1,8 +1,10 @@
 #[allow(warnings)]
 
-pub fn data_types() {
+pub fn data_types() -> (u8, f64, bool, char) {
     let x: u8 = 42;
-    let y: f64 = 3.224242422424;
+    let y: f64 = 3.14;
     let z: bool = false;
-    let a: char = '7';
+    let a: char = 'a';
+
+    (x, y, z, a)
 }
diff --git a/challenges/primitive-data-types/src/starter.rs b/challenges/primitive-data-types/src/starter.rs
index 4104e59..eeae17b 100644
--- a/challenges/primitive-data-types/src/starter.rs
+++ b/challenges/primitive-data-types/src/starter.rs
@@ -1,9 +1,11 @@
-pub fn data_types() {
-    // 1. Define variable `x` of type `u8`
+pub fn data_types() -> (u8, f64, bool, char) {
+    // 1. Define variable of type `u8` and value `42`
 
-    // 2. Define variable `y` of type `f64`
+    // 2. Define variable of type `f64` and value `3.14`
 
-    // 3. Define variable `z` of type `bool`
+    // 3. Define variable of type `bool` and value `false`
 
-    // 4. Define variable `a` of type `char`
+    // 4. Define variable of type `char` and value `'a'`
+
+    // 5. Return a tuple with the variables in the order they were defined
 }
diff --git a/challenges/primitive-data-types/tests/tests.rs b/challenges/primitive-data-types/tests/tests.rs
index 5398546..f8125d0 100644
--- a/challenges/primitive-data-types/tests/tests.rs
+++ b/challenges/primitive-data-types/tests/tests.rs
@@ -1,51 +1,11 @@
-#[cfg(test)]
+use primitive_data_types::*;
 
-mod tests {
-    use primitive_data_types::*;
-    use syntest::{parse_quote, Pat, Stmt, Syntest};
+#[test]
+fn test_compiles() {
+    let (x, y, z, a) = data_types();
 
-    #[test]
-    fn test_compiles() {
-        data_types();
-    }
-
-    #[test]
-    fn test_annotations() {
-        let syntest = Syntest::new("data_types", "./src/lib.rs");
-
-        let pats_actual = syntest.get_pats();
-        let stmts_expected: [Stmt; 4] = [
-            parse_quote! {
-              let x: u8 = 42;
-            },
-            parse_quote! {
-              let y: f64 = 3.14;
-            },
-            parse_quote! {
-              let z: bool = true;
-            },
-            parse_quote! {
-              let a: char = 'R';
-            },
-        ];
-
-        let mut expected_count = 0;
-        for (pat_actual, stmt_expected) in pats_actual.iter().zip(stmts_expected.iter()) {
-            if let Stmt::Local(local_expected) = stmt_expected {
-                if let Pat::Type(type_expected) = &local_expected.pat {
-                    if let Pat::Ident(ident_expected) = &*type_expected.pat {
-                        let pat_expected = &local_expected.pat;
-                        assert_eq!(
-                            pat_actual, pat_expected,
-                            "Wrong type annotated for {}",
-                            ident_expected.ident
-                        );
-                        expected_count += 1;
-                    }
-                }
-            }
-        }
-
-        assert_eq!(expected_count, stmts_expected.len());
-    }
+    assert_eq!(x, 42, "Expected x to be 42");
+    assert_eq!(y, 3.14, "Expected y to be 3.14");
+    assert_eq!(z, false, "Expected z to be false");
+    assert_eq!(a, 'a', "Expected a to be 'a'");
 }