diff --git a/types/better-sqlite3/package.json b/types/better-sqlite3/package.json
index 98363ae7cff74e..e3c092bab5aedb 100644
--- a/types/better-sqlite3/package.json
+++ b/types/better-sqlite3/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "@types/better-sqlite3",
-    "version": "7.6.9999",
+    "version": "9.6.9999",
     "projects": [
         "https://github.com/JoshuaWise/better-sqlite3"
     ],
diff --git a/types/codemirror/addon/mode/loadMode.d.ts b/types/codemirror/addon/mode/loadmode.d.ts
similarity index 100%
rename from types/codemirror/addon/mode/loadMode.d.ts
rename to types/codemirror/addon/mode/loadmode.d.ts
diff --git a/types/codemirror/test/addon/mode/loadMode.ts b/types/codemirror/test/addon/mode/loadmode.ts
similarity index 87%
rename from types/codemirror/test/addon/mode/loadMode.ts
rename to types/codemirror/test/addon/mode/loadmode.ts
index 8cf990bd2ed99c..065015e4001f8e 100644
--- a/types/codemirror/test/addon/mode/loadMode.ts
+++ b/types/codemirror/test/addon/mode/loadmode.ts
@@ -1,5 +1,5 @@
 import CodeMirror from "codemirror";
-import "codemirror/addon/mode/loadMode";
+import "codemirror/addon/mode/loadmode";
 
 CodeMirror.requireMode("javascript", () => {
     console.log("loaded");
diff --git a/types/codemirror/tsconfig.json b/types/codemirror/tsconfig.json
index 563761afa5d8c4..20c1dae16b2270 100644
--- a/types/codemirror/tsconfig.json
+++ b/types/codemirror/tsconfig.json
@@ -53,7 +53,7 @@
         "test/addon/lint/lint.ts",
         "test/addon/lint/yaml-lint.ts",
         "test/addon/merge/merge.ts",
-        "test/addon/mode/loadMode.ts",
+        "test/addon/mode/loadmode.ts",
         "test/addon/mode/multiplex.ts",
         "test/addon/mode/overlay.ts",
         "test/addon/mode/simple.ts",
diff --git a/types/luxon/src/datetime.d.ts b/types/luxon/src/datetime.d.ts
index b90176b394e09d..8210a43dcc4a36 100644
--- a/types/luxon/src/datetime.d.ts
+++ b/types/luxon/src/datetime.d.ts
@@ -903,7 +903,7 @@ export class DateTime<IsValid extends boolean = DefaultValidity> {
      *
      * @param o
      */
-    static isDateTime(o: unknown): o is DateTimeMaybeValid;
+    static isDateTime(o: unknown): o is DateTime;
 
     /**
      * Produce the format string for a set of options
diff --git a/types/luxon/test/luxon-tests.module.ts b/types/luxon/test/luxon-tests.module.ts
index 3cf4f656373150..a5885c57eb7c9b 100644
--- a/types/luxon/test/luxon-tests.module.ts
+++ b/types/luxon/test/luxon-tests.module.ts
@@ -281,9 +281,25 @@ DateTime.min(now, now); // $ExpectType DateTime<true>
 DateTime.min(...[dt, now].filter(date => date)); // $ExpectType DateTime<true> | DateTime<false> | undefined
 DateTime.min(); // $ExpectType undefined
 
-const anything: unknown = 0;
-if (DateTime.isDateTime(anything)) {
-    anything; // $ExpectType DateTime<true> | DateTime<false>
+// DateTime.isDateTime guard check
+function isDateTimeCheck(case1: DateTime | string, case2: DateTime<true> | number, case3: DateTime<false> | boolean) {
+    if (DateTime.isDateTime(case1)) {
+        case1; // $ExpectType DateTime<boolean>
+    } else {
+        case1; // $ExpectType string
+    }
+
+    if (DateTime.isDateTime(case2)) {
+        case2; // $ExpectType DateTime<true>
+    } else {
+        case2; // $ExpectType number
+    }
+
+    if (DateTime.isDateTime(case3)) {
+        case3; // $ExpectType DateTime<false>
+    } else {
+        case3; // $ExpectType boolean
+    }
 }
 
 const { input, result, zone } = DateTime.fromFormatExplain("Aug 6 1982", "MMMM d yyyy");
@@ -349,7 +365,7 @@ dur.toFormat("", {
     floor: true,
     signMode: "negativeLargestOnly",
 });
-
+const anything: unknown = 0;
 if (Duration.isDuration(anything)) {
     anything; // $ExpectType Duration<true> | Duration<false>
 }