diff --git a/expression/expression.go b/expression/expression.go
index cbfa4bfb0ee24..af3107770ff2f 100644
--- a/expression/expression.go
+++ b/expression/expression.go
@@ -1071,8 +1071,7 @@ func scalarExprSupportedByTiKV(sf *ScalarFunction) bool {
 		// json functions.
 		ast.JSONType, ast.JSONExtract, ast.JSONObject, ast.JSONArray, ast.JSONMerge, ast.JSONSet,
 		ast.JSONInsert /*ast.JSONReplace,*/, ast.JSONRemove, ast.JSONLength,
-		// FIXME: JSONUnquote is incompatible with Coprocessor
-		ast.JSONUnquote, ast.JSONContains,
+		ast.JSONUnquote, ast.JSONContains, ast.JSONValid,
 
 		// date functions.
 		ast.Date, ast.Week /* ast.YearWeek, ast.ToSeconds */, ast.DateDiff,
diff --git a/planner/core/integration_test.go b/planner/core/integration_test.go
index a2aa3d643f609..d0cbd57f80a9e 100644
--- a/planner/core/integration_test.go
+++ b/planner/core/integration_test.go
@@ -3375,6 +3375,10 @@ func TestScalarFunctionPushDown(t *testing.T) {
 	tk.MustQuery("explain analyze select /*+read_from_storage(tikv[t])*/ * from t where ascii(e);").
 		CheckAt([]int{0, 3, 6}, rows)
 
+	rows[1][2] = "eq(json_valid(test.t.c), 1)"
+	tk.MustQuery("explain analyze select /*+read_from_storage(tikv[t])*/ * from t where json_valid(c)=1;").
+		CheckAt([]int{0, 3, 6}, rows)
+
 	rows[1][2] = "json_contains(cast(test.t.c, json BINARY), cast(\"1\", json BINARY))"
 	tk.MustQuery("explain analyze select /*+read_from_storage(tikv[t])*/ * from t where json_contains(c, '1');").
 		CheckAt([]int{0, 3, 6}, rows)