diff --git a/src/language-js/traverse/visitor-keys.evaluate.js b/src/language-js/traverse/visitor-keys.evaluate.js
index f04dcfb4a..c2e147aa6 100644
--- a/src/language-js/traverse/visitor-keys.evaluate.js
+++ b/src/language-js/traverse/visitor-keys.evaluate.js
@@ -32,7 +32,6 @@ const additionalVisitorKeys = {
 const excludeVisitorKeys = {
   // From `flowVisitorKeys`
   ArrowFunctionExpression: ["id"],
-  FunctionExpression: ["predicate"],
 
   // TODO: Remove `types` when babel changes AST of `TupleTypeAnnotation`
   // Flow parser changed `.types` to `.elementTypes` https://github.com/facebook/flow/commit/5b60e6a81dc277dfab2e88fa3737a4dc9aafdcab
diff --git a/tests/format/flow/function/__snapshots__/format.test.js.snap b/tests/format/flow/function/__snapshots__/format.test.js.snap
new file mode 100644
index 000000000..03a286d22
--- /dev/null
+++ b/tests/format/flow/function/__snapshots__/format.test.js.snap
@@ -0,0 +1,15 @@
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
+
+exports[`function-predicate.js format 1`] = `
+====================================options=====================================
+parsers: ["flow"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+const fn = function(): %checks  {}
+
+=====================================output=====================================
+const fn = function (): %checks {};
+
+================================================================================
+`;
diff --git a/tests/format/flow/function/format.test.js b/tests/format/flow/function/format.test.js
new file mode 100644
index 000000000..55c339883
--- /dev/null
+++ b/tests/format/flow/function/format.test.js
@@ -0,0 +1 @@
+runFormatTest(import.meta, ["flow"]);
diff --git a/tests/format/flow/function/function-predicate.js b/tests/format/flow/function/function-predicate.js
new file mode 100644
index 000000000..b56758e05
--- /dev/null
+++ b/tests/format/flow/function/function-predicate.js
@@ -0,0 +1 @@
+const fn = function(): %checks  {}
diff --git a/tests/unit/__snapshots__/visitor-keys.js.snap b/tests/unit/__snapshots__/visitor-keys.js.snap
index 851a5d62b..79e545707 100644
--- a/tests/unit/__snapshots__/visitor-keys.js.snap
+++ b/tests/unit/__snapshots__/visitor-keys.js.snap
@@ -372,6 +372,7 @@ exports[`visitor keys estree 1`] = `
     "body",
     "id",
     "params",
+    "predicate",
     "returnType",
     "typeParameters",
   ],