diff --git a/matchers/be_a_directory.go b/matchers/be_a_directory.go
index acffc8570..93d4497c7 100644
--- a/matchers/be_a_directory.go
+++ b/matchers/be_a_directory.go
@@ -52,5 +52,5 @@ func (matcher *BeADirectoryMatcher) FailureMessage(actual interface{}) (message
 }
 
 func (matcher *BeADirectoryMatcher) NegatedFailureMessage(actual interface{}) (message string) {
-	return format.Message(actual, fmt.Sprintf("not be a directory"))
+	return format.Message(actual, "not be a directory")
 }
diff --git a/matchers/be_a_regular_file.go b/matchers/be_a_regular_file.go
index 89441c800..8fefc4deb 100644
--- a/matchers/be_a_regular_file.go
+++ b/matchers/be_a_regular_file.go
@@ -52,5 +52,5 @@ func (matcher *BeARegularFileMatcher) FailureMessage(actual interface{}) (messag
 }
 
 func (matcher *BeARegularFileMatcher) NegatedFailureMessage(actual interface{}) (message string) {
-	return format.Message(actual, fmt.Sprintf("not be a regular file"))
+	return format.Message(actual, "not be a regular file")
 }
diff --git a/matchers/be_an_existing_file.go b/matchers/be_an_existing_file.go
index ec6506b00..e2bdd2811 100644
--- a/matchers/be_an_existing_file.go
+++ b/matchers/be_an_existing_file.go
@@ -32,9 +32,9 @@ func (matcher *BeAnExistingFileMatcher) Match(actual interface{}) (success bool,
 }
 
 func (matcher *BeAnExistingFileMatcher) FailureMessage(actual interface{}) (message string) {
-	return format.Message(actual, fmt.Sprintf("to exist"))
+	return format.Message(actual, "to exist")
 }
 
 func (matcher *BeAnExistingFileMatcher) NegatedFailureMessage(actual interface{}) (message string) {
-	return format.Message(actual, fmt.Sprintf("not to exist"))
+	return format.Message(actual, "not to exist")
 }