diff --git a/lib/puppet/functions/stdlib/end_with.rb b/lib/puppet/functions/stdlib/end_with.rb
index 2be98e6..fc83f70 100644
--- a/lib/puppet/functions/stdlib/end_with.rb
+++ b/lib/puppet/functions/stdlib/end_with.rb
@@ -1,21 +1,21 @@
 # @summary
 #   Returns true if str ends with one of the prefixes given. Each of the prefixes should be a String.
 #
 Puppet::Functions.create_function(:'stdlib::end_with') do
   # @param test_string The string to check
   # @param suffixes The suffixes to check
   # @example
   #    'foobar'.stdlib::end_with('bar') => true
   #    'foobar'.stdlib::end_with('foo') => false
   #    'foobar'.stdlib::end_with(['foo', 'baz']) => false
   # @return [Boolean] True or False
   dispatch :end_with do
-    param 'String[1]', :test_string
+    param 'String', :test_string
     param 'Variant[String[1],Array[String[1], 1]]', :suffixes
     return_type 'Boolean'
   end
 
   def end_with(test_string, suffixes)
     test_string.end_with?(*suffixes)
   end
 end
diff --git a/lib/puppet/functions/stdlib/start_with.rb b/lib/puppet/functions/stdlib/start_with.rb
index 294c72a..28f01bb 100644
--- a/lib/puppet/functions/stdlib/start_with.rb
+++ b/lib/puppet/functions/stdlib/start_with.rb
@@ -1,21 +1,21 @@
 # @summary
 #   Returns true if str starts with one of the prefixes given. Each of the prefixes should be a String.
 #
 Puppet::Functions.create_function(:'stdlib::start_with') do
   # @param test_string The string to check
   # @param prefixes The prefixes to check.
   # @example
   #   'foobar'.stdlib::start_with('foo') => true
   #   'foobar'.stdlib::start_with('bar') => false
   #   'foObar'.stdlib::start_with(['bar', 'baz']) => false
   # @return [Boolean] True or False
   dispatch :start_with do
-    param 'String[1]', :test_string
+    param 'String', :test_string
     param 'Variant[String[1],Array[String[1], 1]]', :prefixes
     return_type 'Boolean'
   end
 
   def start_with(test_string, prefixes)
     test_string.start_with?(*prefixes)
   end
 end
diff --git a/spec/functions/end_with_spec.rb b/spec/functions/end_with_spec.rb
index a9b95ec..5c1e8a9 100644
--- a/spec/functions/end_with_spec.rb
+++ b/spec/functions/end_with_spec.rb
@@ -1,17 +1,13 @@
 require 'spec_helper'
 
 describe 'stdlib::end_with' do
+  it { is_expected.to run.with_params('', 'bar').and_return(false) }
   it { is_expected.to run.with_params('foobar', 'bar').and_return(true) }
   it { is_expected.to run.with_params('foobar', 'foo').and_return(false) }
   it { is_expected.to run.with_params('foobar', ['foo', 'baz']).and_return(false) }
-  it do
-    is_expected.to run.with_params('', 'foo').and_raise_error(
-      ArgumentError, %r{'stdlib::end_with' parameter 'test_string' expects a String\[1\] value}
-    )
-  end
   it do
     is_expected.to run.with_params('foobar', '').and_raise_error(
       ArgumentError, %r{'stdlib::end_with' parameter 'suffixes' expects a value of type String\[1\] or Array\[String\[1\], 1\]}
     )
   end
 end
diff --git a/spec/functions/startswith_spec.rb b/spec/functions/startswith_spec.rb
index 3820883..a259192 100644
--- a/spec/functions/startswith_spec.rb
+++ b/spec/functions/startswith_spec.rb
@@ -1,10 +1,11 @@
 require 'spec_helper'
 
 describe 'stdlib::start_with' do
   it { is_expected.not_to eq(nil) }
   it { is_expected.to run.with_params.and_raise_error(ArgumentError, %r{expects 2 arguments, got none}i) }
   it { is_expected.to run.with_params('').and_raise_error(ArgumentError, %r{expects 2 arguments, got 1}) }
 
+  it { is_expected.to run.with_params('', 'foo').and_return(false) }
   it { is_expected.to run.with_params('foobar', 'foo').and_return(true) }
   it { is_expected.to run.with_params('foObar', ['bar', 'baz']).and_return(false) }
 end