diff --git a/src/index.spec.ts b/src/index.spec.ts
index 0d41f65d2..064f42ee0 100644
--- a/src/index.spec.ts
+++ b/src/index.spec.ts
@@ -189,7 +189,7 @@ describe('ts-node', function () {
         }
 
         expect(err.message).to.contain([
-          `${join(__dirname, '../tests/throw.ts')}:3`,
+          `${join(__dirname, '../tests/throw.ts')}:100`,
           '  bar () { throw new Error(\'this is a demo\') }',
           '                 ^',
           'Error: this is a demo'
@@ -206,7 +206,7 @@ describe('ts-node', function () {
         }
 
         expect(err.message).to.contain([
-          `${join(__dirname, '../tests/throw.ts')}:3`,
+          `${join(__dirname, '../tests/throw.ts')}:100`,
           '  bar () { throw new Error(\'this is a demo\') }',
           '                 ^'
         ].join('\n'))
@@ -611,7 +611,7 @@ describe('ts-node', function () {
       } catch (error) {
         expect(error.stack).to.contain([
           'Error: this is a demo',
-          `    at Foo.bar (${join(__dirname, '../tests/throw.ts')}:3:18)`
+          `    at Foo.bar (${join(__dirname, '../tests/throw.ts')}:100:18)`
         ].join('\n'))
 
         done()
diff --git a/tests/throw.ts b/tests/throw.ts
index 1183d9ff5..dbd4cbc2e 100644
--- a/tests/throw.ts
+++ b/tests/throw.ts
@@ -1,4 +1,101 @@
+// intentional whitespace to prove that sourcemaps are working.  Throw should happen on line 100.
+// 100 lines is meant to be far more space than the helper functions would take.
 class Foo {
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   constructor () { this.bar() }
   bar () { throw new Error('this is a demo') }
 }