diff --git a/clients/client-cognito-identity/tsconfig.es.json b/clients/client-cognito-identity/tsconfig.es.json
index 1a6863945e758..ac004116eb332 100644
--- a/clients/client-cognito-identity/tsconfig.es.json
+++ b/clients/client-cognito-identity/tsconfig.es.json
@@ -4,7 +4,8 @@
     "baseUrl": ".",
     "rootDir": "src",
     "outDir": "dist-es",
-    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"]
+    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"],
+    "types": ["mocha", "node"]
   },
   "include": ["src/"]
 }
diff --git a/clients/client-cognito-identity/tsconfig.types.json b/clients/client-cognito-identity/tsconfig.types.json
index a18e8f3a97f7a..0e52672aa1bc2 100644
--- a/clients/client-cognito-identity/tsconfig.types.json
+++ b/clients/client-cognito-identity/tsconfig.types.json
@@ -3,7 +3,8 @@
   "compilerOptions": {
     "baseUrl": ".",
     "rootDir": "src",
-    "declarationDir": "dist-types"
+    "declarationDir": "dist-types",
+    "types": ["mocha", "node"]
   },
   "exclude": ["test/**/*", "dist-types/**/*"],
   "include": ["src/"]
diff --git a/clients/client-lex-runtime-service/tsconfig.es.json b/clients/client-lex-runtime-service/tsconfig.es.json
index 1a6863945e758..ac004116eb332 100644
--- a/clients/client-lex-runtime-service/tsconfig.es.json
+++ b/clients/client-lex-runtime-service/tsconfig.es.json
@@ -4,7 +4,8 @@
     "baseUrl": ".",
     "rootDir": "src",
     "outDir": "dist-es",
-    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"]
+    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"],
+    "types": ["mocha", "node"]
   },
   "include": ["src/"]
 }
diff --git a/clients/client-lex-runtime-service/tsconfig.types.json b/clients/client-lex-runtime-service/tsconfig.types.json
index a18e8f3a97f7a..0e52672aa1bc2 100644
--- a/clients/client-lex-runtime-service/tsconfig.types.json
+++ b/clients/client-lex-runtime-service/tsconfig.types.json
@@ -3,7 +3,8 @@
   "compilerOptions": {
     "baseUrl": ".",
     "rootDir": "src",
-    "declarationDir": "dist-types"
+    "declarationDir": "dist-types",
+    "types": ["mocha", "node"]
   },
   "exclude": ["test/**/*", "dist-types/**/*"],
   "include": ["src/"]
diff --git a/clients/client-mediastore-data/tsconfig.es.json b/clients/client-mediastore-data/tsconfig.es.json
index 1a6863945e758..f7327f178c16d 100644
--- a/clients/client-mediastore-data/tsconfig.es.json
+++ b/clients/client-mediastore-data/tsconfig.es.json
@@ -4,7 +4,8 @@
     "baseUrl": ".",
     "rootDir": "src",
     "outDir": "dist-es",
-    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"]
+    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"],
+    "types": ["mocha"]
   },
   "include": ["src/"]
 }
diff --git a/clients/client-mediastore-data/tsconfig.types.json b/clients/client-mediastore-data/tsconfig.types.json
index a18e8f3a97f7a..1db0fb8ef7ee0 100644
--- a/clients/client-mediastore-data/tsconfig.types.json
+++ b/clients/client-mediastore-data/tsconfig.types.json
@@ -3,7 +3,8 @@
   "compilerOptions": {
     "baseUrl": ".",
     "rootDir": "src",
-    "declarationDir": "dist-types"
+    "declarationDir": "dist-types",
+    "types": ["mocha"]
   },
   "exclude": ["test/**/*", "dist-types/**/*"],
   "include": ["src/"]
diff --git a/clients/client-s3-control/tsconfig.es.json b/clients/client-s3-control/tsconfig.es.json
index 1a6863945e758..ac004116eb332 100644
--- a/clients/client-s3-control/tsconfig.es.json
+++ b/clients/client-s3-control/tsconfig.es.json
@@ -4,7 +4,8 @@
     "baseUrl": ".",
     "rootDir": "src",
     "outDir": "dist-es",
-    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"]
+    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"],
+    "types": ["mocha", "node"]
   },
   "include": ["src/"]
 }
diff --git a/clients/client-s3-control/tsconfig.types.json b/clients/client-s3-control/tsconfig.types.json
index a18e8f3a97f7a..0e52672aa1bc2 100644
--- a/clients/client-s3-control/tsconfig.types.json
+++ b/clients/client-s3-control/tsconfig.types.json
@@ -3,7 +3,8 @@
   "compilerOptions": {
     "baseUrl": ".",
     "rootDir": "src",
-    "declarationDir": "dist-types"
+    "declarationDir": "dist-types",
+    "types": ["mocha", "node"]
   },
   "exclude": ["test/**/*", "dist-types/**/*"],
   "include": ["src/"]
diff --git a/clients/client-s3/tsconfig.es.json b/clients/client-s3/tsconfig.es.json
index 1a6863945e758..ac004116eb332 100644
--- a/clients/client-s3/tsconfig.es.json
+++ b/clients/client-s3/tsconfig.es.json
@@ -4,7 +4,8 @@
     "baseUrl": ".",
     "rootDir": "src",
     "outDir": "dist-es",
-    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"]
+    "lib": ["dom", "es5", "es2015.promise", "es2015.collection", "es2015.iterable", "es2015.symbol.wellknown"],
+    "types": ["mocha", "node"]
   },
   "include": ["src/"]
 }
diff --git a/clients/client-s3/tsconfig.types.json b/clients/client-s3/tsconfig.types.json
index a18e8f3a97f7a..0e52672aa1bc2 100644
--- a/clients/client-s3/tsconfig.types.json
+++ b/clients/client-s3/tsconfig.types.json
@@ -3,7 +3,8 @@
   "compilerOptions": {
     "baseUrl": ".",
     "rootDir": "src",
-    "declarationDir": "dist-types"
+    "declarationDir": "dist-types",
+    "types": ["mocha", "node"]
   },
   "exclude": ["test/**/*", "dist-types/**/*"],
   "include": ["src/"]