diff --git a/resources/test/fixtures/pylint/consider_merging_isinstance.py b/resources/test/fixtures/pylint/consider_merging_isinstance.py
index d3387bd5ce..52b196999b 100644
--- a/resources/test/fixtures/pylint/consider_merging_isinstance.py
+++ b/resources/test/fixtures/pylint/consider_merging_isinstance.py
@@ -34,4 +34,5 @@ def isinstances():
     result = isinstance(var[7], int) or not isinstance(var[7], float)
     result = isinstance(var[6], int) or isinstance(var[7], float)
     result = isinstance(var[6], int) or isinstance(var[7], int)
+    result = isinstance(var[6], (float, int)) or False
     return result
diff --git a/src/pylint/plugins/consider_merging_isinstance.rs b/src/pylint/plugins/consider_merging_isinstance.rs
index 30690dd03e..f1a476938f 100644
--- a/src/pylint/plugins/consider_merging_isinstance.rs
+++ b/src/pylint/plugins/consider_merging_isinstance.rs
@@ -18,29 +18,31 @@ pub fn consider_merging_isinstance(
         return;
     }
 
-    let mut obj_to_types: FxHashMap<String, FxHashSet<String>> = FxHashMap::default();
+    let mut obj_to_types: FxHashMap<String, (usize, FxHashSet<String>)> = FxHashMap::default();
     for value in values {
         if let ExprKind::Call { func, args, .. } = &value.node {
             if matches!(&func.node, ExprKind::Name { id, .. } if id == "isinstance") {
                 if let [obj, types] = &args[..] {
-                    obj_to_types
+                    let (num_calls, matches) = obj_to_types
                         .entry(obj.to_string())
-                        .or_insert_with(FxHashSet::default)
-                        .extend(match &types.node {
-                            ExprKind::Tuple { elts, .. } => {
-                                elts.iter().map(std::string::ToString::to_string).collect()
-                            }
-                            _ => {
-                                vec![types.to_string()]
-                            }
-                        });
+                        .or_insert_with(|| (0, FxHashSet::default()));
+
+                    *num_calls += 1;
+                    matches.extend(match &types.node {
+                        ExprKind::Tuple { elts, .. } => {
+                            elts.iter().map(std::string::ToString::to_string).collect()
+                        }
+                        _ => {
+                            vec![types.to_string()]
+                        }
+                    });
                 }
             }
         }
     }
 
-    for (obj, types) in obj_to_types {
-        if types.len() > 1 {
+    for (obj, (num_calls, types)) in obj_to_types {
+        if num_calls > 1 && types.len() > 1 {
             checker.add_check(Check::new(
                 CheckKind::ConsiderMergingIsinstance(obj, types.into_iter().sorted().collect()),
                 Range::from_located(expr),