diff --git a/exercise/testing/Cargo.toml b/exercise/testing/Cargo.toml
index 2e8a30c..d51f9ec 100644
--- a/exercise/testing/Cargo.toml
+++ b/exercise/testing/Cargo.toml
@@ -9,15 +9,15 @@ edition = "2021"
 # Challenge Help 1: If you choose to take on the challenge, you'll need to add `criterion` as a
 # development dependency. Here is one way to do it:
 
-# [dev-dependencies]
-# criterion = { version = "0.3", features = ["html_reports"] }
+[dev-dependencies]
+criterion = { version = "0.3", features = ["html_reports"] }
 
 # Challenge Help 2: Each benchmark needs a `[[bench]]` section with a name and disabling the harness.
 # A name "somename" will correspond with a file "benches/somename.rs"
 
-# [[bench]]
-# name = "somename"
-# harness = false
+[[bench]]
+name = "somename"
+harness = false
 
 # Challenge Help 3: The Criterion documentation has a great tutorial for how to actually write your
 # benchmark.  Don't skip the part about `black_box()`!
diff --git a/exercise/testing/benches/somename.rs b/exercise/testing/benches/somename.rs
new file mode 100644
index 0000000..936fefc
--- /dev/null
+++ b/exercise/testing/benches/somename.rs
@@ -0,0 +1,9 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use testing::sploosh;
+
+pub fn sploosh_benchmark(c: &mut Criterion) {
+    c.bench_function("sploosh", |b| b.iter(|| sploosh(black_box(8), black_box(9), black_box(10))));
+}
+
+criterion_group!(benches, sploosh_benchmark);
+criterion_main!(benches);
diff --git a/exercise/testing/src/lib.rs b/exercise/testing/src/lib.rs
index 0ad2818..b907b99 100644
--- a/exercise/testing/src/lib.rs
+++ b/exercise/testing/src/lib.rs
@@ -3,6 +3,7 @@ pub fn sploosh(x: i32, y: i32, z: i32) -> i32 {
         (x, _, _) if x < 0 => 99,
         (1, 2, 3) => 4,
         (5, 6, 7) => 3,
+        (8, 9, 10) => 7,
         (x, y, z) => x + y - z,
     }
 }
@@ -13,9 +14,11 @@ pub fn splish(a: i32, b: i32) -> i32 {
 
 // 1. Use the `cfg` attribute to mark the `test` module below as a test module
 
+#[cfg(test)]
 mod test {
     // 2. Bring all the library items into scope with a `use` statement
     // Hint: It's okay to use `*` here.
+    use super::*;
 
     // 3. Write a test function that verifies the following condition using the `assert_eq!` or
     // `assert_ne!` macros
@@ -26,10 +29,24 @@ mod test {
     // `cargo test` should run your tests and pass
     // Hint: Don't forget the `#[test]` attribute for your test function!
 
+    #[test]
+    fn test_sploosh() {
+        assert_eq!(sploosh(1, 2, 3), 4);
+        assert_ne!(sploosh(5, 6, 7), 4);
+        assert_eq!(sploosh(-1, 2, 3), 99);
+    }
+
     // 4. Write a test function that verifies the following conditions using the `assert!` macro
     // - splish(100, 10) is negative
     // - splish(40, 20) is positive
     // - splish(9, 3) is 0
+
+    #[test]
+    fn test_splish() {
+        assert!(splish(100, 10) < 0);
+        assert!(splish(40, 20) > 0);
+        assert!(splish(9, 3) == 0);
+    }
 }
 
 // 5. Create a `tests/` directory and an integration test file `tests/more_tests.rs`
diff --git a/exercise/testing/tests/more_tests.rs b/exercise/testing/tests/more_tests.rs
new file mode 100644
index 0000000..d6fa1ff
--- /dev/null
+++ b/exercise/testing/tests/more_tests.rs
@@ -0,0 +1,6 @@
+use testing::{sploosh, splish};
+
+#[test]
+pub fn test_sploosh_splish() {
+    assert_eq!(sploosh(splish(-1, 0), splish(1, 1), splish(3, 2)), 4);
+}