diff --git a/packages/ast-spec/tsconfig.spec.json b/packages/ast-spec/tsconfig.spec.json
index 659371721f52..0b3ced92edb0 100644
--- a/packages/ast-spec/tsconfig.spec.json
+++ b/packages/ast-spec/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/eslint-plugin-internal/tsconfig.spec.json b/packages/eslint-plugin-internal/tsconfig.spec.json
index 393aba970694..9a4c51865206 100644
--- a/packages/eslint-plugin-internal/tsconfig.spec.json
+++ b/packages/eslint-plugin-internal/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/eslint-plugin/tsconfig.spec.json b/packages/eslint-plugin/tsconfig.spec.json
index 9f4b9364dc69..91d638a2f9a3 100644
--- a/packages/eslint-plugin/tsconfig.spec.json
+++ b/packages/eslint-plugin/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/integration-tests/tsconfig.spec.json b/packages/integration-tests/tsconfig.spec.json
index 87c9e09ea1b5..d7f954ed0f80 100644
--- a/packages/integration-tests/tsconfig.spec.json
+++ b/packages/integration-tests/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/parser/tsconfig.spec.json b/packages/parser/tsconfig.spec.json
index ed1cb0f7aee1..be15ae29f809 100644
--- a/packages/parser/tsconfig.spec.json
+++ b/packages/parser/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/rule-schema-to-typescript-types/tsconfig.spec.json b/packages/rule-schema-to-typescript-types/tsconfig.spec.json
index 37b6200ff959..b4ff90ff9db0 100644
--- a/packages/rule-schema-to-typescript-types/tsconfig.spec.json
+++ b/packages/rule-schema-to-typescript-types/tsconfig.spec.json
@@ -5,7 +5,7 @@
     "resolveJsonModule": true,
     "types": ["vitest/globals", "vitest/importMeta"]
   },
-  "include": ["vitest.config.*", "package.json", "tests"],
+  "include": ["vitest.config.mts", "package.json", "tests"],
   "exclude": ["**/fixtures/**"],
   "references": [
     {
diff --git a/packages/rule-tester/tsconfig.spec.json b/packages/rule-tester/tsconfig.spec.json
index dc967aa83a9c..a0429996f532 100644
--- a/packages/rule-tester/tsconfig.spec.json
+++ b/packages/rule-tester/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/scope-manager/tsconfig.spec.json b/packages/scope-manager/tsconfig.spec.json
index c414b0447b3c..672e3e21a702 100644
--- a/packages/scope-manager/tsconfig.spec.json
+++ b/packages/scope-manager/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/type-utils/tsconfig.spec.json b/packages/type-utils/tsconfig.spec.json
index e43afdbe6540..7ec995aaf7dc 100644
--- a/packages/type-utils/tsconfig.spec.json
+++ b/packages/type-utils/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/types/tsconfig.spec.json b/packages/types/tsconfig.spec.json
index 0bbf682bb3f6..872d3c655b27 100644
--- a/packages/types/tsconfig.spec.json
+++ b/packages/types/tsconfig.spec.json
@@ -5,7 +5,7 @@
     "resolveJsonModule": true,
     "types": ["vitest/globals", "vitest/importMeta"]
   },
-  "include": ["vitest.config.*", "package.json", "tests"],
+  "include": ["vitest.config.mts", "package.json", "tests"],
   "exclude": ["**/fixtures/**"],
   "references": [
     {
diff --git a/packages/typescript-eslint/tsconfig.spec.json b/packages/typescript-eslint/tsconfig.spec.json
index 1cd0105ff31f..e65e82d51bfa 100644
--- a/packages/typescript-eslint/tsconfig.spec.json
+++ b/packages/typescript-eslint/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/typescript-estree/tsconfig.spec.json b/packages/typescript-estree/tsconfig.spec.json
index f7886ed89110..39d5f78b4b0b 100644
--- a/packages/typescript-estree/tsconfig.spec.json
+++ b/packages/typescript-estree/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/utils/tsconfig.build.json b/packages/utils/tsconfig.build.json
index 4fab0f466938..bff36900f2be 100644
--- a/packages/utils/tsconfig.build.json
+++ b/packages/utils/tsconfig.build.json
@@ -10,7 +10,7 @@
   },
   "include": ["src/**/*.ts", "typings"],
   "exclude": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "src/**/*.spec.ts",
     "src/**/*.test.ts",
     "**/fixtures/**"
diff --git a/packages/utils/tsconfig.spec.json b/packages/utils/tsconfig.spec.json
index ed1dd851638c..ae7365b0ef8e 100644
--- a/packages/utils/tsconfig.spec.json
+++ b/packages/utils/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/packages/visitor-keys/tsconfig.spec.json b/packages/visitor-keys/tsconfig.spec.json
index 1038d735d20b..31c516043297 100644
--- a/packages/visitor-keys/tsconfig.spec.json
+++ b/packages/visitor-keys/tsconfig.spec.json
@@ -7,7 +7,7 @@
     "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "vitest.config.*",
+    "vitest.config.mts",
     "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
diff --git a/tsconfig.repo-config-files.json b/tsconfig.repo-config-files.json
index 867c7e788d50..8949960d9cea 100644
--- a/tsconfig.repo-config-files.json
+++ b/tsconfig.repo-config-files.json
@@ -12,8 +12,6 @@
     "tools/**/*.ts",
     "tools/**/*.mts",
     "eslint.config.mjs",
-    "vitest.config.base.mts",
-    "vitest.config.mts",
     "knip.ts",
     ".github/**/*.js"
   ],