diff --git a/src/services/outliningElementsCollector.ts b/src/services/outliningElementsCollector.ts
index 03ae0529ca9..bd294209088 100644
--- a/src/services/outliningElementsCollector.ts
+++ b/src/services/outliningElementsCollector.ts
@@ -1,7 +1,7 @@
 /* @internal */
 namespace ts.OutliningElementsCollector {
     const collapseText = "...";
-    const maxDepth = 20;
+    const maxDepth = 40;
     const defaultLabel = "#region";
     const regionMatch = new RegExp("^\\s*//\\s*#(end)?region(?:\\s+(.*))?$");
 
diff --git a/tests/cases/fourslash/getOutliningSpans.ts b/tests/cases/fourslash/getOutliningSpans.ts
index 93665889eb4..4e2a58c9acb 100644
--- a/tests/cases/fourslash/getOutliningSpans.ts
+++ b/tests/cases/fourslash/getOutliningSpans.ts
@@ -79,32 +79,19 @@
 ////  }|]
 ////}|]
 //////outline with deep nesting
-////module m1[|{
-////    module m2[| {
-////        module m3[| {
-////            module m4[| {
-////                module m5[| {
-////                    module m6[| {
-////                        module m7[| {
-////                            module m8[| {
-////                                module m9[| {
-////                                    module m10[| {
-////                                        module m11 {
-////                                            module m12 {
-////                                                export interface IFoo {
-////                                                }
-////                                            }
-////                                        }
-////                                    }|]
-////                                }|]
-////                            }|]
-////                        }|]
-////                    }|]
-////                }|]
-////            }|]
-////        }|]
-////    }|]
-////}|]
+////var nest =[| [[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[
+////  [|[
+////      [
+////        [
+////          [
+////            [
+////              1,2,3    
+////            ]    
+////          ]
+////        ]
+////      ]
+////  ]|]
+////]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|];
 ////
 //////outline after a deeply nested node
 ////class AfterNestedNodes[| {
diff --git a/tests/cases/fourslash/shims-pp/getOutliningSpans.ts b/tests/cases/fourslash/shims-pp/getOutliningSpans.ts
index 93665889eb4..4e2a58c9acb 100644
--- a/tests/cases/fourslash/shims-pp/getOutliningSpans.ts
+++ b/tests/cases/fourslash/shims-pp/getOutliningSpans.ts
@@ -79,32 +79,19 @@
 ////  }|]
 ////}|]
 //////outline with deep nesting
-////module m1[|{
-////    module m2[| {
-////        module m3[| {
-////            module m4[| {
-////                module m5[| {
-////                    module m6[| {
-////                        module m7[| {
-////                            module m8[| {
-////                                module m9[| {
-////                                    module m10[| {
-////                                        module m11 {
-////                                            module m12 {
-////                                                export interface IFoo {
-////                                                }
-////                                            }
-////                                        }
-////                                    }|]
-////                                }|]
-////                            }|]
-////                        }|]
-////                    }|]
-////                }|]
-////            }|]
-////        }|]
-////    }|]
-////}|]
+////var nest =[| [[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[
+////  [|[
+////      [
+////        [
+////          [
+////            [
+////              1,2,3    
+////            ]    
+////          ]
+////        ]
+////      ]
+////  ]|]
+////]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|];
 ////
 //////outline after a deeply nested node
 ////class AfterNestedNodes[| {
diff --git a/tests/cases/fourslash/shims/getOutliningSpans.ts b/tests/cases/fourslash/shims/getOutliningSpans.ts
index 93665889eb4..4e2a58c9acb 100644
--- a/tests/cases/fourslash/shims/getOutliningSpans.ts
+++ b/tests/cases/fourslash/shims/getOutliningSpans.ts
@@ -79,32 +79,19 @@
 ////  }|]
 ////}|]
 //////outline with deep nesting
-////module m1[|{
-////    module m2[| {
-////        module m3[| {
-////            module m4[| {
-////                module m5[| {
-////                    module m6[| {
-////                        module m7[| {
-////                            module m8[| {
-////                                module m9[| {
-////                                    module m10[| {
-////                                        module m11 {
-////                                            module m12 {
-////                                                export interface IFoo {
-////                                                }
-////                                            }
-////                                        }
-////                                    }|]
-////                                }|]
-////                            }|]
-////                        }|]
-////                    }|]
-////                }|]
-////            }|]
-////        }|]
-////    }|]
-////}|]
+////var nest =[| [[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[[|[
+////  [|[
+////      [
+////        [
+////          [
+////            [
+////              1,2,3    
+////            ]    
+////          ]
+////        ]
+////      ]
+////  ]|]
+////]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|]]|];
 ////
 //////outline after a deeply nested node
 ////class AfterNestedNodes[| {