diff --git a/types/ember-testing-helpers/ember-testing-helpers-tests.ts b/types/ember-testing-helpers/ember-testing-helpers-tests.ts
index 70ff59a2d8..3691e3ede0 100644
--- a/types/ember-testing-helpers/ember-testing-helpers-tests.ts
+++ b/types/ember-testing-helpers/ember-testing-helpers-tests.ts
@@ -1,4 +1,4 @@
-import RSVP from 'rsvp';
+import RSVP = require('rsvp');
 
 function testAndThen() {
     const result: RSVP.Promise<string, never> = andThen(() => 'some string');
diff --git a/types/ember-testing-helpers/index.d.ts b/types/ember-testing-helpers/index.d.ts
index e45d844487..33231a0b65 100644
--- a/types/ember-testing-helpers/index.d.ts
+++ b/types/ember-testing-helpers/index.d.ts
@@ -10,7 +10,7 @@
 
 /// <reference types="jquery" />
 
-import RSVP from 'rsvp';
+import RSVP = require('rsvp');
 
 type KeyEventType = 'keydown' | 'keyup' | 'keypress';
 type WaitResult<T> = RSVP.Promise<T, never>;
diff --git a/types/ember-testing-helpers/tsconfig.json b/types/ember-testing-helpers/tsconfig.json
index cd7634bd25..aaf474ecba 100644
--- a/types/ember-testing-helpers/tsconfig.json
+++ b/types/ember-testing-helpers/tsconfig.json
@@ -14,8 +14,7 @@
         ],
         "types": [],
         "noEmit": true,
-        "forceConsistentCasingInFileNames": true,
-        "allowSyntheticDefaultImports": true
+        "forceConsistentCasingInFileNames": true
     },
     "files": [
         "index.d.ts",
diff --git a/types/ember/index.d.ts b/types/ember/index.d.ts
index 56b21e7405..c69832e367 100644
--- a/types/ember/index.d.ts
+++ b/types/ember/index.d.ts
@@ -10,7 +10,7 @@
 
 // Capitalization is intentional: this makes it much easier to re-export RSVP on
 // the Ember namespace.
-import Rsvp from 'rsvp';
+import Rsvp = require('rsvp');
 
 declare namespace EmberStates {
     interface Transition {
diff --git a/types/ember/tsconfig.json b/types/ember/tsconfig.json
index fbc4052a08..b73838d20e 100644
--- a/types/ember/tsconfig.json
+++ b/types/ember/tsconfig.json
@@ -14,8 +14,7 @@
         ],
         "types": [],
         "noEmit": true,
-        "forceConsistentCasingInFileNames": true,
-        "allowSyntheticDefaultImports": true
+        "forceConsistentCasingInFileNames": true
     },
     "files": [
         "index.d.ts",