diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e3aba19..761a874 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,6 +9,27 @@ on:
       - '*'
 
 jobs:
+  gofmt:
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Go
+      uses: actions/setup-go@v2.1.4
+      with:
+        go-version: 1.16
+      id: go
+    # Check the codebase has been formatted by `gofmt`.
+    # We run two `gofmt` commands for different purposes:
+    # 1. `gofmt -d .`: to print diffs in the CI log if any.
+    # 2. `gofmt -l`: to test there is a diff in the codebase. This is because
+    #    `gofmt` exits with exit status 0 even if there is a diff.
+    #     This is recommended in https://github.com/golang/go/issues/24230)
+    - name: Run gofmt
+      run: |
+        gofmt -d .
+        test -z $(gofmt -l .)
+
   linux-tests:
     runs-on: ubuntu-20.04
 
diff --git a/fuseops/ops.go b/fuseops/ops.go
index 8af3d51..7902a0e 100644
--- a/fuseops/ops.go
+++ b/fuseops/ops.go
@@ -311,7 +311,7 @@ type CreateFileOp struct {
 	// The handle may be supplied in future ops like ReadFileOp that contain a
 	// file handle. The file system must ensure this ID remains valid until a
 	// later call to ReleaseFileHandle.
-	Handle HandleID
+	Handle    HandleID
 	OpContext OpContext
 }
 
@@ -787,8 +787,8 @@ type SyncFileOp struct {
 // return any errors that occur.
 type FlushFileOp struct {
 	// The file and handle being flushed.
-	Inode  InodeID
-	Handle HandleID
+	Inode     InodeID
+	Handle    HandleID
 	OpContext OpContext
 }
 
diff --git a/mount_darwin.go b/mount_darwin.go
index 8558acf..35b1ace 100644
--- a/mount_darwin.go
+++ b/mount_darwin.go
@@ -124,7 +124,7 @@ func convertMountArgs(daemonVar string, libVar string,
 		}
 	}
 
-	env := []string{ libVar+"=" }
+	env := []string{libVar + "="}
 	if daemonVar != "" {
 		env = append(env, daemonVar+"="+os.Args[0])
 	}
@@ -135,7 +135,7 @@ func convertMountArgs(daemonVar string, libVar string,
 		//
 		// OSXFUSE seems to ignore InitResponse.MaxWrite, and uses
 		// this instead.
-		"-o", "iosize="+strconv.FormatUint(buffer.MaxWriteSize, 10),
+		"-o", "iosize=" + strconv.FormatUint(buffer.MaxWriteSize, 10),
 	}
 
 	return argv, env, nil