diff --git a/src/lints/function_marked_deprecated.ron b/src/lints/function_marked_deprecated.ron
index fb94d66e..7b457659 100644
--- a/src/lints/function_marked_deprecated.ron
+++ b/src/lints/function_marked_deprecated.ron
@@ -38,6 +38,10 @@ SemverQuery(
                             path @filter(op: "=", value: ["%path"])
                             public_api @filter(op: "=", value: ["$true"])
                         }
+
+                        parameter @fold {
+                            parameters: name @output
+                        }
                     }
                 }
             }
@@ -49,4 +53,7 @@ SemverQuery(
     },
     error_message: "A function is now #[deprecated]. Downstream crates will get a compiler warning when using this function.",
     per_result_error_template: Some("function {{join \"::\" path}} in {{span_filename}}:{{span_begin_line}}"),
+    witness: (
+        hint_template: r#"let witness = {{#if parameters}}|{{join ", " parameters}}| {{/if}}{{join "::" path}}({{join ", " parameters}});"#,
+    ),
 )
diff --git a/test_outputs/query_execution/function_marked_deprecated.snap b/test_outputs/query_execution/function_marked_deprecated.snap
index f4afd4d6..ab2243e3 100644
--- a/test_outputs/query_execution/function_marked_deprecated.snap
+++ b/test_outputs/query_execution/function_marked_deprecated.snap
@@ -1,12 +1,12 @@
 ---
 source: src/query.rs
 expression: "&query_execution_results"
-snapshot_kind: text
 ---
 {
   "./test_crates/function_marked_deprecated/": [
     {
       "name": String("function_to_deprecated"),
+      "parameters": List([]),
       "path": List([
         String("function_marked_deprecated"),
         String("function_to_deprecated"),
@@ -18,6 +18,9 @@ snapshot_kind: text
     },
     {
       "name": String("function_to_deprecated_message"),
+      "parameters": List([
+        String("input"),
+      ]),
       "path": List([
         String("function_marked_deprecated"),
         String("function_to_deprecated_message"),
diff --git a/test_outputs/witnesses/function_marked_deprecated.snap b/test_outputs/witnesses/function_marked_deprecated.snap
new file mode 100644
index 00000000..8c50ef76
--- /dev/null
+++ b/test_outputs/witnesses/function_marked_deprecated.snap
@@ -0,0 +1,14 @@
+---
+source: src/query.rs
+description: "Lint `function_marked_deprecated` did not have the expected witness output.\nSee https://github.com/obi1kenobi/cargo-semver-checks/blob/main/CONTRIBUTING.md#testing-witnesses\nfor more information."
+expression: "&actual_witnesses"
+---
+[["./test_crates/function_marked_deprecated/"]]
+filename = 'src/lib.rs'
+begin_line = 7
+hint = 'let witness = function_marked_deprecated::function_to_deprecated();'
+
+[["./test_crates/function_marked_deprecated/"]]
+filename = 'src/lib.rs'
+begin_line = 12
+hint = 'let witness = |input| function_marked_deprecated::function_to_deprecated_message(input);'