diff --git a/bin/tests/data/repeated_keys.nix b/bin/tests/data/repeated_keys.nix
deleted file mode 100644
index c051fa7..0000000
--- a/bin/tests/data/repeated_keys.nix
+++ /dev/null
@@ -1,29 +0,0 @@
-[
-  # fine
-  {
-    foo.bar = 1;
-  }
-
-  # do not raise on rec
-  rec {
-    foo.x = foo.y;
-    foo.y = 2;
-    foo.z = 3;
-  }
-
-  # exactly 3 occurrences
-  {
-    foo.bar = 1;
-    foo.bar."hello" = 1;
-    foo.again = 1;
-  }
-
-  # more than 3, omit the extra
-  {
-    foo.baz.bar1 = 1;
-    foo.baz.bar2 = 2;
-    foo.baz.bar3 = 3;
-    foo.baz.bar4 = 4;
-    foo.baz.bar5 = 5;
-  }
-]
diff --git a/bin/tests/main.rs b/bin/tests/main.rs
index b80f8b9..3a06bb1 100644
--- a/bin/tests/main.rs
+++ b/bin/tests/main.rs
@@ -44,6 +44,5 @@ fn test_cli(test_name: &str, file_path: &str, args: &[&str]) {
 }
 
 test_lint! {
-    repeated_keys,
     empty_list_concat
 }
diff --git a/bin/tests/repeated_keys.rs b/bin/tests/repeated_keys.rs
new file mode 100644
index 0000000..ec2427a
--- /dev/null
+++ b/bin/tests/repeated_keys.rs
@@ -0,0 +1,42 @@
+mod _utils;
+
+use indoc::indoc;
+
+use macros::generate_tests;
+
+generate_tests! {
+    rule: useless_has_attr,
+    expressions: [
+        // fine
+        "{ foo.bar = 1; }",
+
+        // do not raise on rec
+        indoc! {"
+            rec {
+              foo.x = foo.y;
+              foo.y = 2;
+              foo.z = 3;
+            }
+        "},
+
+        // exactly 3 occurrences
+        indoc! {r#"
+            {
+              foo.bar = 1;
+              foo.bar."hello" = 1;
+              foo.again = 1;
+            }
+        "#},
+
+        // more than 3, omit the extra
+        indoc! {"
+            {
+              foo.baz.bar1 = 1;
+              foo.baz.bar2 = 2;
+              foo.baz.bar3 = 3;
+              foo.baz.bar4 = 4;
+              foo.baz.bar5 = 5;
+            }
+        "},
+    ],
+}
diff --git a/bin/tests/snapshots/main__repeated_keys_fix.snap b/bin/tests/snapshots/main__repeated_keys_fix.snap
deleted file mode 100644
index af691ae..0000000
--- a/bin/tests/snapshots/main__repeated_keys_fix.snap
+++ /dev/null
@@ -1,5 +0,0 @@
----
-source: bin/tests/main.rs
-expression: "&stdout"
----
-
diff --git a/bin/tests/snapshots/main__repeated_keys_lint.snap b/bin/tests/snapshots/main__repeated_keys_lint.snap
deleted file mode 100644
index 41d7aaf..0000000
--- a/bin/tests/snapshots/main__repeated_keys_lint.snap
+++ /dev/null
@@ -1,30 +0,0 @@
----
-source: bin/tests/main.rs
-expression: "&stdout"
----
-[W20] Warning: Avoid repeated keys in attribute sets
-    ╭─[tests/data/repeated_keys.nix:16:5]
-    │
- 16 │     foo.bar = 1;
-    ·     ───┬───  
-    ·        ╰───── The key foo is first assigned here ...
- 17 │     foo.bar."hello" = 1;
-    ·     ───────┬───────  
-    ·            ╰───────── ... repeated here ...
- 18 │     foo.again = 1;
-    ·     ────┬────  
-    ·         ╰────── ... and here. Try foo = { bar=...; bar."hello"=...; again=...; } instead.
-────╯
-[W20] Warning: Avoid repeated keys in attribute sets
-    ╭─[tests/data/repeated_keys.nix:23:5]
-    │
- 23 │     foo.baz.bar1 = 1;
-    ·     ──────┬─────  
-    ·           ╰─────── The key foo is first assigned here ...
- 24 │     foo.baz.bar2 = 2;
-    ·     ──────┬─────  
-    ·           ╰─────── ... repeated here ...
- 25 │     foo.baz.bar3 = 3;
-    ·     ──────┬─────  
-    ·           ╰─────── ... and here (2 occurrences omitted). Try foo = { baz.bar1=...; baz.bar2=...; baz.bar3=...; } instead.
-────╯
diff --git a/bin/tests/snapshots/repeated_keys__fix_107c49dd2c0b84878c81852acfd4aee37038d8367b6bc7f5b43ce051c24908e5.snap b/bin/tests/snapshots/repeated_keys__fix_107c49dd2c0b84878c81852acfd4aee37038d8367b6bc7f5b43ce051c24908e5.snap
new file mode 100644
index 0000000..2b28053
--- /dev/null
+++ b/bin/tests/snapshots/repeated_keys__fix_107c49dd2c0b84878c81852acfd4aee37038d8367b6bc7f5b43ce051c24908e5.snap
@@ -0,0 +1,5 @@
+---
+source: bin/tests/repeated_keys.rs
+expression: "\"{\\n  foo.bar = 1;\\n  foo.bar.\\\"hello\\\" = 1;\\n  foo.again = 1;\\n}\\n\""
+---
+
diff --git a/bin/tests/snapshots/repeated_keys__fix_2987d09ebf239c581be44d6a044ceb0290e769e15f802483ec2f796af57c4e0a.snap b/bin/tests/snapshots/repeated_keys__fix_2987d09ebf239c581be44d6a044ceb0290e769e15f802483ec2f796af57c4e0a.snap
new file mode 100644
index 0000000..398935d
--- /dev/null
+++ b/bin/tests/snapshots/repeated_keys__fix_2987d09ebf239c581be44d6a044ceb0290e769e15f802483ec2f796af57c4e0a.snap
@@ -0,0 +1,5 @@
+---
+source: bin/tests/repeated_keys.rs
+expression: "\"{ foo.bar = 1; }\""
+---
+
diff --git a/bin/tests/snapshots/repeated_keys__fix_653aae0c9fb8b448e30e62c7daa38519eded4ba2078838f788b3e769db564123.snap b/bin/tests/snapshots/repeated_keys__fix_653aae0c9fb8b448e30e62c7daa38519eded4ba2078838f788b3e769db564123.snap
new file mode 100644
index 0000000..22e3cd9
--- /dev/null
+++ b/bin/tests/snapshots/repeated_keys__fix_653aae0c9fb8b448e30e62c7daa38519eded4ba2078838f788b3e769db564123.snap
@@ -0,0 +1,5 @@
+---
+source: bin/tests/repeated_keys.rs
+expression: "\"{\\n  foo.baz.bar1 = 1;\\n  foo.baz.bar2 = 2;\\n  foo.baz.bar3 = 3;\\n  foo.baz.bar4 = 4;\\n  foo.baz.bar5 = 5;\\n}\\n\""
+---
+
diff --git a/bin/tests/snapshots/repeated_keys__fix_7928b443d258628d0f648fe2e30278f84cbe97274683df67fd436584732d7b2c.snap b/bin/tests/snapshots/repeated_keys__fix_7928b443d258628d0f648fe2e30278f84cbe97274683df67fd436584732d7b2c.snap
new file mode 100644
index 0000000..6a08ccd
--- /dev/null
+++ b/bin/tests/snapshots/repeated_keys__fix_7928b443d258628d0f648fe2e30278f84cbe97274683df67fd436584732d7b2c.snap
@@ -0,0 +1,5 @@
+---
+source: bin/tests/repeated_keys.rs
+expression: "\"rec {\\n  foo.x = foo.y;\\n  foo.y = 2;\\n  foo.z = 3;\\n}\\n\""
+---
+
diff --git a/bin/tests/snapshots/repeated_keys__lint_107c49dd2c0b84878c81852acfd4aee37038d8367b6bc7f5b43ce051c24908e5.snap b/bin/tests/snapshots/repeated_keys__lint_107c49dd2c0b84878c81852acfd4aee37038d8367b6bc7f5b43ce051c24908e5.snap
new file mode 100644
index 0000000..b396762
--- /dev/null
+++ b/bin/tests/snapshots/repeated_keys__lint_107c49dd2c0b84878c81852acfd4aee37038d8367b6bc7f5b43ce051c24908e5.snap
@@ -0,0 +1,17 @@
+---
+source: bin/tests/repeated_keys.rs
+expression: "\"{\\n  foo.bar = 1;\\n  foo.bar.\\\"hello\\\" = 1;\\n  foo.again = 1;\\n}\\n\""
+---
+[W20] Warning: Avoid repeated keys in attribute sets
+   ╭─[<temp_file_path>:2:3]
+   │
+ 2 │   foo.bar = 1;
+   ·   ───┬───  
+   ·      ╰───── The key foo is first assigned here ...
+ 3 │   foo.bar."hello" = 1;
+   ·   ───────┬───────  
+   ·          ╰───────── ... repeated here ...
+ 4 │   foo.again = 1;
+   ·   ────┬────  
+   ·       ╰────── ... and here. Try foo = { bar=...; bar."hello"=...; again=...; } instead.
+───╯
diff --git a/bin/tests/snapshots/repeated_keys__lint_2987d09ebf239c581be44d6a044ceb0290e769e15f802483ec2f796af57c4e0a.snap b/bin/tests/snapshots/repeated_keys__lint_2987d09ebf239c581be44d6a044ceb0290e769e15f802483ec2f796af57c4e0a.snap
new file mode 100644
index 0000000..398935d
--- /dev/null
+++ b/bin/tests/snapshots/repeated_keys__lint_2987d09ebf239c581be44d6a044ceb0290e769e15f802483ec2f796af57c4e0a.snap
@@ -0,0 +1,5 @@
+---
+source: bin/tests/repeated_keys.rs
+expression: "\"{ foo.bar = 1; }\""
+---
+
diff --git a/bin/tests/snapshots/repeated_keys__lint_653aae0c9fb8b448e30e62c7daa38519eded4ba2078838f788b3e769db564123.snap b/bin/tests/snapshots/repeated_keys__lint_653aae0c9fb8b448e30e62c7daa38519eded4ba2078838f788b3e769db564123.snap
new file mode 100644
index 0000000..81f395b
--- /dev/null
+++ b/bin/tests/snapshots/repeated_keys__lint_653aae0c9fb8b448e30e62c7daa38519eded4ba2078838f788b3e769db564123.snap
@@ -0,0 +1,17 @@
+---
+source: bin/tests/repeated_keys.rs
+expression: "\"{\\n  foo.baz.bar1 = 1;\\n  foo.baz.bar2 = 2;\\n  foo.baz.bar3 = 3;\\n  foo.baz.bar4 = 4;\\n  foo.baz.bar5 = 5;\\n}\\n\""
+---
+[W20] Warning: Avoid repeated keys in attribute sets
+   ╭─[<temp_file_path>:2:3]
+   │
+ 2 │   foo.baz.bar1 = 1;
+   ·   ──────┬─────  
+   ·         ╰─────── The key foo is first assigned here ...
+ 3 │   foo.baz.bar2 = 2;
+   ·   ──────┬─────  
+   ·         ╰─────── ... repeated here ...
+ 4 │   foo.baz.bar3 = 3;
+   ·   ──────┬─────  
+   ·         ╰─────── ... and here (2 occurrences omitted). Try foo = { baz.bar1=...; baz.bar2=...; baz.bar3=...; } instead.
+───╯
diff --git a/bin/tests/snapshots/repeated_keys__lint_7928b443d258628d0f648fe2e30278f84cbe97274683df67fd436584732d7b2c.snap b/bin/tests/snapshots/repeated_keys__lint_7928b443d258628d0f648fe2e30278f84cbe97274683df67fd436584732d7b2c.snap
new file mode 100644
index 0000000..6a08ccd
--- /dev/null
+++ b/bin/tests/snapshots/repeated_keys__lint_7928b443d258628d0f648fe2e30278f84cbe97274683df67fd436584732d7b2c.snap
@@ -0,0 +1,5 @@
+---
+source: bin/tests/repeated_keys.rs
+expression: "\"rec {\\n  foo.x = foo.y;\\n  foo.y = 2;\\n  foo.z = 3;\\n}\\n\""
+---
+