diff --git a/packages/babel-generator/test/fixtures/flow/declare-statements/actual.js b/packages/babel-generator/test/fixtures/flow/declare-statements/actual.js
index 543efd048a..d5744cfdcc 100644
--- a/packages/babel-generator/test/fixtures/flow/declare-statements/actual.js
+++ b/packages/babel-generator/test/fixtures/flow/declare-statements/actual.js
@@ -9,6 +9,7 @@ declare class A<T> extends B<T> { x: number }
 declare class A { static foo(): number; static x : string }
 declare class A { static [ indexer: number]: string }
 declare class A { static () : number }
+declare class B { (): number }
 declare class A mixins B<T>, C {}
 declare type A = string
 declare type T<U> = { [k:string]: U }
diff --git a/packages/babel-generator/test/fixtures/flow/declare-statements/expected.js b/packages/babel-generator/test/fixtures/flow/declare-statements/expected.js
index 7498e25025..6f867c8eef 100644
--- a/packages/babel-generator/test/fixtures/flow/declare-statements/expected.js
+++ b/packages/babel-generator/test/fixtures/flow/declare-statements/expected.js
@@ -9,6 +9,7 @@ declare class A<T> extends B<T> { x: number }
 declare class A { static foo: () => number, static x: string, }
 declare class A { static [indexer: number]: string }
 declare class A { static (): number }
+declare class B { (): number }
 declare class A mixins B<T>, C {}
 declare type A = string;
 declare type T<U> = { [k: string]: U };
diff --git a/packages/babel-generator/test/fixtures/regression/babylon-317/actual.js b/packages/babel-generator/test/fixtures/regression/babylon-317/actual.js
new file mode 100644
index 0000000000..b2a6432b44
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/regression/babylon-317/actual.js
@@ -0,0 +1 @@
+({ set = {} }) => set;
diff --git a/packages/babel-generator/test/fixtures/regression/babylon-317/expected.js b/packages/babel-generator/test/fixtures/regression/babylon-317/expected.js
new file mode 100644
index 0000000000..b2a6432b44
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/regression/babylon-317/expected.js
@@ -0,0 +1 @@
+({ set = {} }) => set;
diff --git a/packages/babel-generator/test/fixtures/types/Literal/actual.js b/packages/babel-generator/test/fixtures/types/Literal/actual.js
index 6bd9f84a96..8c4a774d6d 100644
--- a/packages/babel-generator/test/fixtures/types/Literal/actual.js
+++ b/packages/babel-generator/test/fixtures/types/Literal/actual.js
@@ -10,3 +10,4 @@ false;
 0b10;
 0o70;
 0X1F;
+-0b1111011;
diff --git a/packages/babel-generator/test/fixtures/types/Literal/expected.js b/packages/babel-generator/test/fixtures/types/Literal/expected.js
index 6bd9f84a96..8c4a774d6d 100644
--- a/packages/babel-generator/test/fixtures/types/Literal/expected.js
+++ b/packages/babel-generator/test/fixtures/types/Literal/expected.js
@@ -10,3 +10,4 @@ false;
 0b10;
 0o70;
 0X1F;
+-0b1111011;