diff --git a/types/cytoscape/cytoscape-tests.ts b/types/cytoscape/cytoscape-tests.ts
index d6e78ff3cf..7c9f5353c9 100644
--- a/types/cytoscape/cytoscape-tests.ts
+++ b/types/cytoscape/cytoscape-tests.ts
@@ -545,6 +545,10 @@ eles.difference(collNodes).abscomp().intersection(collSel).symdiff(collNodes);
 const diff = collSel.diff(collNodes);
 cy.collection().merge(diff.left).merge(diff.right).merge(diff.both).unmerge(collSel).filter((ele, i, eles) => true);
 
+nodes.map(n => n.degree(false));
+edges.map(e => e.source());
+eles.map(e => e.id());
+
 eles.sort((a, b) => 1).map((ele, i, eles) => [i, ele]);
 eles.reduce<any[]>((prev, ele, i, eles) => [...prev, [ele, i]], []).concat(['finish']);
 const min = eles.min((ele, i, eles) => ele.id.length + i); min.ele.scratch('min', min.value).scratch('min').value;
diff --git a/types/cytoscape/index.d.ts b/types/cytoscape/index.d.ts
index ddc0f12a16..77a7d20dc3 100644
--- a/types/cytoscape/index.d.ts
+++ b/types/cytoscape/index.d.ts
@@ -2517,7 +2517,7 @@ declare namespace cytoscape {
          *
          * http://js.cytoscape.org/#eles.map
          */
-        map(fn: (ele: CollectionArgument, i: number, eles: CollectionArgument) => any, thisArg?: any): any[];
+        map<T>(fn: (ele: TOut, i: number, eles: CollectionArgument) => T, thisArg?: any): T[];
 
         /**
          * Reduce a single value by applying a