diff --git a/src/test_util/mock_ids.rs b/src/test_util/mock_ids.rs
index 31d2716..1ccc693 100644
--- a/src/test_util/mock_ids.rs
+++ b/src/test_util/mock_ids.rs
@@ -109,68 +109,74 @@ impl From<bool> for FileID {
     }
 }
 
-#[test]
-fn true_makes_valids() {
-    let uri = Uri::from(true);
-    let alias_id = AliasID::from(true);
-    let share_id = ShareID::from(true);
-    let file_id = FileID::from(true);
+// technically redundant, but kept for refactoring purposes
+#[cfg(test)]
+mod tests {
+    use super::*;
 
-    assert!((&uri, &alias_id).check().is_ok());
-    assert!(share_id.check().is_ok());
-    assert!((&share_id, &file_id).check().is_ok());
-}
+    #[test]
+    fn true_makes_valids() {
+        let uri = Uri::from(true);
+        let alias_id = AliasID::from(true);
+        let share_id = ShareID::from(true);
+        let file_id = FileID::from(true);
 
-#[test]
-fn default_is_valid() {
-    let uri = Uri::default();
-    let alias_id = AliasID::from(true); // no `impl Default`
-    let share_id = ShareID::default();
-    let file_id = FileID::default();
-
-    assert!((&uri, &alias_id).check().is_ok());
-    assert!(share_id.check().is_ok());
-    assert!((&share_id, &file_id).check().is_ok());
-}
-
-#[test]
-fn false_makes_invalids() {
-    use crate::Parameter;
-
-    fn test_check(value: impl CheckID, callback: impl FnOnce(&Parameter) -> bool) {
-        let check = value.check().unwrap_err();
-        let p = check.get_invalid_param().unwrap();
-        assert!(callback(p));
+        assert!((&uri, &alias_id).check().is_ok());
+        assert!(share_id.check().is_ok());
+        assert!((&share_id, &file_id).check().is_ok());
     }
 
-    // valid ids
-    let uri = Uri::from(true);
-    let alias_id = AliasID::from(true);
-    let share_id = ShareID::from(true);
-    let file_id = FileID::from(true);
+    #[test]
+    fn default_is_valid() {
+        let uri = Uri::default();
+        let alias_id = AliasID::from(true); // no `impl Default`
+        let share_id = ShareID::default();
+        let file_id = FileID::default();
 
-    // invalid ids
-    let uri_i = Uri::from(false);
-    let alias_id_i = AliasID::from(false);
-    let share_id_i = ShareID::from(false);
-    let file_id_i = FileID::from(false);
+        assert!((&uri, &alias_id).check().is_ok());
+        assert!(share_id.check().is_ok());
+        assert!((&share_id, &file_id).check().is_ok());
+    }
 
-    // param checks
-    let is_uri_i = |p: &Parameter| matches!(p, Parameter::Uri(_));
-    let is_alias_id_i = |p: &Parameter| matches!(p, Parameter::AliasID(_));
-    let is_share_id_i = |p: &Parameter| matches!(p, Parameter::ShareID(_));
-    let is_file_id_i = |p: &Parameter| matches!(p, Parameter::FileID(_));
+    #[test]
+    fn false_makes_invalids() {
+        use crate::Parameter;
 
-    // uri + alias
-    test_check((&uri_i, &alias_id_i), is_uri_i);
-    test_check((&uri_i, &alias_id), is_uri_i);
-    test_check((&uri, &alias_id_i), is_alias_id_i);
+        fn test_check(value: impl CheckID, callback: impl FnOnce(&Parameter) -> bool) {
+            let check = value.check().unwrap_err();
+            let p = check.get_invalid_param().unwrap();
+            assert!(callback(p));
+        }
 
-    // share
-    test_check(&share_id_i, is_share_id_i);
+        // valid ids
+        let uri = Uri::from(true);
+        let alias_id = AliasID::from(true);
+        let share_id = ShareID::from(true);
+        let file_id = FileID::from(true);
 
-    // share + file
-    test_check((&share_id_i, &file_id_i), is_share_id_i);
-    test_check((&share_id_i, &file_id), is_share_id_i);
-    test_check((&share_id, &file_id_i), is_file_id_i);
+        // invalid ids
+        let uri_i = Uri::from(false);
+        let alias_id_i = AliasID::from(false);
+        let share_id_i = ShareID::from(false);
+        let file_id_i = FileID::from(false);
+
+        // param checks
+        let is_uri_i = |p: &Parameter| matches!(p, Parameter::Uri(_));
+        let is_alias_id_i = |p: &Parameter| matches!(p, Parameter::AliasID(_));
+        let is_share_id_i = |p: &Parameter| matches!(p, Parameter::ShareID(_));
+        let is_file_id_i = |p: &Parameter| matches!(p, Parameter::FileID(_));
+
+        // uri + alias
+        test_check((&uri_i, &alias_id_i), is_uri_i);
+        test_check((&uri_i, &alias_id), is_uri_i);
+        test_check((&uri, &alias_id_i), is_alias_id_i);
+
+        // share
+        test_check(&share_id_i, is_share_id_i);
+
+        // share + file
+        test_check((&share_id_i, &file_id_i), is_share_id_i);
+        test_check((&share_id_i, &file_id), is_share_id_i);
+        test_check((&share_id, &file_id_i), is_file_id_i);
+    }
 }
diff --git a/src/test_util/mod.rs b/src/test_util/mod.rs
index 1e14475..ee26994 100644
--- a/src/test_util/mod.rs
+++ b/src/test_util/mod.rs
@@ -29,8 +29,14 @@ pub fn create_file(data: &[u8]) -> NamedTempFile {
     tmp
 }
 
-#[test]
-#[should_panic = "`impl foo for bar` expected: 1, actual: 0"]
-fn make_check_trait_panic() {
-    check_trait(0, 1, "foo", "bar");
+// technically redundant, but kept for refactoring purposes
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    #[should_panic = "`impl foo for bar` expected: 1, actual: 0"]
+    fn make_check_trait_panic() {
+        check_trait(0, 1, "foo", "bar");
+    }
 }