diff --git a/crates/rpl/src/lib.rs b/crates/rpl/src/lib.rs
index 91180c1..6290fb2 100644
--- a/crates/rpl/src/lib.rs
+++ b/crates/rpl/src/lib.rs
@@ -14,23 +14,33 @@ pub fn from_ron(raw: &str) -> Rpl {
 #[derive(Serialize, Deserialize, PartialEq, Eq, Debug)]
 pub struct Rpl(pub Vec<Instruction>);
 
-#[test]
-fn test_simple_deserialize() {
-    const TEST_DATA: &str =
-        "([Read( (source: File(\"~/example/file.png\"), format: Png) ),Math(Add),Write(( target: File(\"~/example/out.jpg\"), format: Jpeg))])";
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::instructions::{
+        read::{SourceFormat, SourceType},
+        write::{TargetFormat, TargetType},
+        MathInstruction,
+    };
 
-    assert_eq!(
-        from_ron(TEST_DATA),
-        Rpl(vec![
-            Instruction::Read(instructions::read::Read {
-                source: SourceType::File("~/example/file.png".into()),
-                format: SourceFormat::Png
-            }),
-            Instruction::Math(MathInstruction::Add),
-            Instruction::Write(instructions::write::Write {
-                target: TargetType::File("~/example/out.jpg".into()),
-                format: TargetFormat::Jpeg
-            })
-        ])
-    );
+    #[test]
+    fn test_simple_deserialize() {
+        const TEST_DATA: &str =
+            "([Read( (source: File(\"~/example/file.png\"), format: Png) ),Math(Add),Write(( target: File(\"~/example/out.jpg\"), format: Jpeg))])";
+
+        assert_eq!(
+            from_ron(TEST_DATA),
+            Rpl(vec![
+                Instruction::Read(instructions::read::Read {
+                    source: SourceType::File("~/example/file.png".into()),
+                    format: SourceFormat::Png
+                }),
+                Instruction::Math(MathInstruction::Add),
+                Instruction::Write(instructions::write::Write {
+                    target: TargetType::File("~/example/out.jpg".into()),
+                    format: TargetFormat::Jpeg
+                })
+            ])
+        );
+    }
 }
diff --git a/flake.nix b/flake.nix
index d8e5186..aa617a3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -40,6 +40,7 @@
                     just nushell
                     typst typst-lsp
                     mold
+                    cargo-nextest
                   ];
                 })
               ];
diff --git a/justfile b/justfile
index 3715e45..396f6eb 100644
--- a/justfile
+++ b/justfile
@@ -1,3 +1,5 @@
+all: test docs
+
 # Compile all documentation as in proposals and design documents, placing them under `docs/compiled`.
 docs:
   #!/usr/bin/env nu
@@ -9,3 +11,7 @@ docs:
     )
     mv $pdf docs/compiled
   } | ignore
+
+test:
+  #!/usr/bin/env nu
+  cargo nextest run