diff --git a/.travis.yml b/.travis.yml
index 72d5bd7..83e3996 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -37,7 +37,7 @@ before_script:
 - ln -sv ${TRAVIS_BUILD_DIR} ${GOPATH%%:*}/src/gopkg.in/urfave/cli.v2
 
 script:
-- flake8 runtests cli-v1-to-v2
+- flake8 runtests cli-v1-to-v2 generate-flag-types
 - ./runtests gen
 - ./runtests vet
 - ./runtests test
diff --git a/generate-flag-types b/generate-flag-types
index 28069b3..4ac7c04 100755
--- a/generate-flag-types
+++ b/generate-flag-types
@@ -37,8 +37,9 @@ The meaning of each field is as follows:
                name (string) - The type "name", which will be suffixed with
                                `Flag` when generating the type definition
                                for `cli` and the wrapper type for `altsrc`
-               type (string) - The type that the generated `Flag` type for `cli`
-                               is expected to "contain" as its `.Value` member
+               type (string) - The type that the generated `Flag` type for
+                               `cli` is expected to "contain" as its `.Value`
+                               member
                 value (bool) - Should the generated `cli` type have a `Value`
                                member?
                  dest (bool) - Should the generated `cli` type support a