diff --git a/archive/archive_test.go b/archive/archive_test.go
index 495cac8..85e4122 100644
--- a/archive/archive_test.go
+++ b/archive/archive_test.go
@@ -132,7 +132,7 @@ func TestDecompressStreamXz(t *testing.T) {
 	archive, err := os.Open(tmp + "archive.xz")
 	_, err = DecompressStream(archive)
 	if err != nil {
-		t.Fatalf("Failed to decompress a xz file.")
+		t.Fatalf("Failed to decompress an xz file.")
 	}
 }
 
@@ -181,7 +181,7 @@ func TestExtensionUncompressed(t *testing.T) {
 	compression := Uncompressed
 	output := compression.Extension()
 	if output != "tar" {
-		t.Fatalf("The extension of a uncompressed archive should be 'tar'.")
+		t.Fatalf("The extension of an uncompressed archive should be 'tar'.")
 	}
 }
 func TestExtensionBzip2(t *testing.T) {
diff --git a/archive/changes_test.go b/archive/changes_test.go
index bca6825..8a2d0e8 100644
--- a/archive/changes_test.go
+++ b/archive/changes_test.go
@@ -252,7 +252,7 @@ func TestChangesWithChangesGH13590(t *testing.T) {
 	checkChanges(expectedChanges, changes, t)
 }
 
-// Create an directory, copy it, make sure we report no changes between the two
+// Create a directory, copy it, make sure we report no changes between the two
 func TestChangesDirsEmpty(t *testing.T) {
 	// TODO Windows. There may be a way of running this, but turning off for now
 	// as createSampleDir uses symlinks.
diff --git a/authorization/authz.go b/authorization/authz.go
index 08d3e2c..ebbc380 100644
--- a/authorization/authz.go
+++ b/authorization/authz.go
@@ -40,7 +40,7 @@ func NewCtx(authZPlugins []Plugin, user, userAuthNMethod, requestMethod, request
 	}
 }
 
-// Ctx stores a a single request-response interaction context
+// Ctx stores a single request-response interaction context
 type Ctx struct {
 	user            string
 	userAuthNMethod string
diff --git a/httputils/resumablerequestreader_test.go b/httputils/resumablerequestreader_test.go
index 7006f04..5a2906d 100644
--- a/httputils/resumablerequestreader_test.go
+++ b/httputils/resumablerequestreader_test.go
@@ -99,7 +99,7 @@ func (errorReaderCloser) Read(p []byte) (n int, err error) {
 	return 0, fmt.Errorf("An error occurred")
 }
 
-// If a an unknown error is encountered, return 0, nil and log it
+// If an unknown error is encountered, return 0, nil and log it
 func TestResumableRequestReaderWithReadError(t *testing.T) {
 	var req *http.Request
 	req, err := http.NewRequest("GET", "", nil)
diff --git a/ioutils/readers.go b/ioutils/readers.go
index e73b02b..63f3c07 100644
--- a/ioutils/readers.go
+++ b/ioutils/readers.go
@@ -55,7 +55,7 @@ func HashData(src io.Reader) (string, error) {
 	return "sha256:" + hex.EncodeToString(h.Sum(nil)), nil
 }
 
-// OnEOFReader wraps a io.ReadCloser and a function
+// OnEOFReader wraps an io.ReadCloser and a function
 // the function will run at the end of file or close the file.
 type OnEOFReader struct {
 	Rc io.ReadCloser
diff --git a/jsonmessage/jsonmessage.go b/jsonmessage/jsonmessage.go
index 65cccbc..91b073b 100644
--- a/jsonmessage/jsonmessage.go
+++ b/jsonmessage/jsonmessage.go
@@ -13,7 +13,7 @@ import (
 )
 
 // JSONError wraps a concrete Code and Message, `Code` is
-// is a integer error code, `Message` is the error message.
+// is an integer error code, `Message` is the error message.
 type JSONError struct {
 	Code    int    `json:"code,omitempty"`
 	Message string `json:"message,omitempty"`
diff --git a/mflag/README.md b/mflag/README.md
index da00efa..5e81bb2 100644
--- a/mflag/README.md
+++ b/mflag/README.md
@@ -1,5 +1,5 @@
 Package mflag (aka multiple-flag) implements command-line flag parsing.  
-It's an **hacky** fork of the [official golang package](http://golang.org/pkg/flag/)
+It's a **hacky** fork of the [official golang package](http://golang.org/pkg/flag/)
 
 It adds:
 
diff --git a/mflag/flag.go b/mflag/flag.go
index e2a0c42..5014157 100644
--- a/mflag/flag.go
+++ b/mflag/flag.go
@@ -24,7 +24,7 @@
 //
 //	You can also add "deprecated" flags, they are still usable, but are not shown
 //	in the usage and will display a warning when you try to use them. `#` before
-//	an option means this option is deprecated, if there is an following option
+//	an option means this option is deprecated, if there is a following option
 //	without `#` ahead, then that's the replacement, if not, it will just be removed:
 //		var ip = flag.Int([]string{"#f", "#flagname", "-flagname"}, 1234, "help message for flagname")
 //	this will display: `Warning: '-f' is deprecated, it will be replaced by '--flagname' soon. See usage.` or
@@ -1236,7 +1236,7 @@ func (v mergeVal) Name() string {
 	return v.key
 }
 
-// Merge is an helper function that merges n FlagSets into a single dest FlagSet
+// Merge is a helper function that merges n FlagSets into a single dest FlagSet
 // In case of name collision between the flagsets it will apply
 // the destination FlagSet's errorHandling behavior.
 func Merge(dest *FlagSet, flagsets ...*FlagSet) error {
diff --git a/progress/progress.go b/progress/progress.go
index 61315cb..df3c2ba 100644
--- a/progress/progress.go
+++ b/progress/progress.go
@@ -38,7 +38,7 @@ func (out chanOutput) WriteProgress(p Progress) error {
 	return nil
 }
 
-// ChanOutput returns a Output that writes progress updates to the
+// ChanOutput returns an Output that writes progress updates to the
 // supplied channel.
 func ChanOutput(progressChan chan<- Progress) Output {
 	return chanOutput(progressChan)