diff --git a/prodos/bitmap_test.go b/prodos/bitmap_test.go
index d464e7b..3161da0 100644
--- a/prodos/bitmap_test.go
+++ b/prodos/bitmap_test.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by an MIT
 // license that can be found in the LICENSE file.
 
-// This file provides tests for access to volum bitmap on
+// This file provides tests for access to volume bitmap on
 // a ProDOS drive image
 
 package prodos
@@ -89,3 +89,26 @@ func TestMarkBlockInVolumeBitmap(t *testing.T) {
 		})
 	}
 }
+
+func TestUpdateVolumeBitmap(t *testing.T) {
+	blockList := []uint16{10, 11, 12, 100, 120}
+
+	virtualDisk := NewMemoryFile(0x2000000)
+	CreateVolume(virtualDisk, "VIRTUAL.DISK", 0xFFFE)
+	updateVolumeBitmap(virtualDisk, blockList)
+
+	for _, tt := range blockList {
+		testname := fmt.Sprintf("%d", tt)
+		t.Run(testname, func(t *testing.T) {
+
+			volumeBitmap, err := ReadVolumeBitmap(virtualDisk)
+			if err != nil {
+				t.Error("got error, want nil")
+			}
+			free := checkFreeBlockInVolumeBitmap(volumeBitmap, tt)
+			if free {
+				t.Errorf("got true, want false")
+			}
+		})
+	}
+}
diff --git a/prodos/directory.go b/prodos/directory.go
index ea574b6..eaaf1c9 100644
--- a/prodos/directory.go
+++ b/prodos/directory.go
@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 // This file provides access to read, write, delete
-// fand parse directories on a ProDOS drive image
+// and parse directories on a ProDOS drive image
 
 package prodos
 
@@ -117,7 +117,7 @@ func ReadDirectory(reader io.ReaderAt, path string) (VolumeHeader, DirectoryHead
 // on a ProDOS image
 func CreateDirectory(readerWriter ReaderWriterAt, path string) error {
 	if len(path) == 0 {
-		return errors.New("cannot create directory with path")
+		return errors.New("cannot create directory without path")
 	}
 
 	// add volume name if not full path
diff --git a/prodos/directory_test.go b/prodos/directory_test.go
new file mode 100644
index 0000000..bf3a00b
--- /dev/null
+++ b/prodos/directory_test.go
@@ -0,0 +1,79 @@
+// Copyright Terence J. Boldt (c)2024
+// Use of this source code is governed by an MIT
+// license that can be found in the LICENSE file.
+
+// This file provides tests for directories on
+// a ProDOS drive image
+
+package prodos
+
+import (
+	"testing"
+)
+
+func TestCreateDirectoryWithoutPathFails(t *testing.T) {
+	t.Run("TestCreateDirectoryWithoutPathFails", func(t *testing.T) {
+		file := NewMemoryFile(0x2000000)
+
+		CreateVolume(file, "test.volume", 1024)
+
+		err := CreateDirectory(file, "")
+
+		if err == nil {
+			t.Errorf("got nil, want non-nil")
+		}
+	})
+}
+
+func TestCreateDuplicateDirectoryFails(t *testing.T) {
+	t.Run("TestCreateDuplicateDirectoryFails", func(t *testing.T) {
+		file := NewMemoryFile(0x2000000)
+
+		CreateVolume(file, "test.volume", 1024)
+
+		err := CreateDirectory(file, "duplicate")
+		if err != nil {
+			t.Errorf("failed to create directory: %s", err)
+		}
+
+		err = CreateDirectory(file, "duplicate")
+
+		if err == nil {
+			t.Error("got nil, want non-nil")
+		}
+	})
+}
+
+func TestCreateAndReadDirectory(t *testing.T) {
+	var tests = []struct {
+		testName      string
+		createPath    string
+		readPath      string
+		expectedCount int
+	}{
+		{"checkRoot", "", "/test", 0},
+		{"checkCreateInRoot", "one", "/test", 1},
+		{"checkRootCreateInSub", "/test/one/two", "/test", 1},
+		{"checkSub", "", "/test/one", 1},
+	}
+
+	file := NewMemoryFile(0x2000000)
+	CreateVolume(file, "test", 1024)
+
+	for _, tt := range tests {
+		t.Run(tt.testName, func(t *testing.T) {
+			if len(tt.createPath) > 0 {
+				CreateDirectory(file, tt.createPath)
+			}
+			_, _, fileEntries, err := ReadDirectory(file, tt.readPath)
+
+			if err != nil {
+				t.Errorf("got error %s", err)
+			}
+			got := len(fileEntries)
+			if got != int(tt.expectedCount) {
+				t.Errorf("got %d, want %d", got, tt.expectedCount)
+			}
+		})
+	}
+}
diff --git a/prodos/file_test.go b/prodos/file_test.go
index 37ac6ab..c17d27c 100644
--- a/prodos/file_test.go
+++ b/prodos/file_test.go
@@ -39,26 +39,3 @@ func TestCreateBlocklist(t *testing.T) {
 		})
 	}
 }
-
-func TestUpdateVolumeBitmap(t *testing.T) {
-	blockList := []uint16{10, 11, 12, 100, 120}
-
-	virtualDisk := NewMemoryFile(0x2000000)
-	CreateVolume(virtualDisk, "VIRTUAL.DISK", 0xFFFE)
-	updateVolumeBitmap(virtualDisk, blockList)
-
-	for _, tt := range blockList {
-		testname := fmt.Sprintf("%d", tt)
-		t.Run(testname, func(t *testing.T) {
-
-			volumeBitmap, err := ReadVolumeBitmap(virtualDisk)
-			if err != nil {
-				t.Error("got error, want nil")
-			}
-			free := checkFreeBlockInVolumeBitmap(volumeBitmap, tt)
-			if free {
-				t.Errorf("got true, want false")
-			}
-		})
-	}
-}