diff --git a/src/utilities/__tests__/buildClientSchema-test.js b/src/utilities/__tests__/buildClientSchema-test.js
index ed09df4682..c5d57250e6 100644
--- a/src/utilities/__tests__/buildClientSchema-test.js
+++ b/src/utilities/__tests__/buildClientSchema-test.js
@@ -619,7 +619,7 @@ describe('Type System: build schema from introspection', () => {
       queryTypeIntrospection.fields[0].args[0].type.name = 'SomeUnion';
 
       expect(() => buildClientSchema(introspection)).to.throw(
-        'Introspection must provide input type for arguments.',
+        'Introspection must provide input type for arguments, but received: SomeUnion.',
       );
     });
 
@@ -637,7 +637,7 @@ describe('Type System: build schema from introspection', () => {
       queryTypeIntrospection.fields[0].type.name = 'SomeInputObject';
 
       expect(() => buildClientSchema(introspection)).to.throw(
-        'Introspection must provide output type for fields.',
+        'Introspection must provide output type for fields, but received: SomeInputObject.',
       );
     });
 
diff --git a/src/utilities/buildClientSchema.js b/src/utilities/buildClientSchema.js
index ecea2bfe1a..9d541e3e07 100644
--- a/src/utilities/buildClientSchema.js
+++ b/src/utilities/buildClientSchema.js
@@ -143,7 +143,9 @@ export function buildClientSchema(
     const type = getType(typeRef);
     invariant(
       isInputType(type),
-      'Introspection must provide input type for arguments, but received: ' + inspect(type),
+      'Introspection must provide input type for arguments, but received: ' +
+        inspect(type) +
+        '.',
     );
     return type;
   }
@@ -154,7 +156,9 @@ export function buildClientSchema(
     const type = getType(typeRef);
     invariant(
       isOutputType(type),
-      'Introspection must provide output type for fields, but received: ' + inspect(type),
+      'Introspection must provide output type for fields, but received: ' +
+        inspect(type) +
+        '.',
     );
     return type;
   }