diff --git a/segment/tests/test_frame_segment.py b/segment/tests/test_frame_segment.py
new file mode 100644
index 0000000..1a21a8c
--- /dev/null
+++ b/segment/tests/test_frame_segment.py
@@ -0,0 +1,75 @@
+import unittest
+
+from segment import Segment, FrameSegment
+from segment.tests import SegmentSharedTestCase
+
+
+class FrameSegmentTestCase(SegmentSharedTestCase):
+    """Test the FrameSegment class."""
+
+    EXPECTED_TYPE = "frame"
+    EXPECTED_TRIM = "trim"
+    EXPECTED_SETPTS = "setpts"
+    EXPECTED_FRAME_NUMBER = 42
+
+    def setUp(self):
+        """Set up for test."""
+        super().setUp()
+        self.segment = FrameSegment(
+            file=self.EXPECTED_INPUT_FILE,
+            punch_in=self.EXPECTED_PUNCH_IN,
+            punch_out=self.EXPECTED_PUNCH_OUT,
+            input_stream=self.EXPECTED_INPUT_STREAM,
+            frame_number=self.EXPECTED_FRAME_NUMBER)
+        self.expected_input_options = [
+            "-loop", "1",
+            "-t", str(self.EXPECTED_DURATION),
+            "-i", self.EXPECTED_INPUT_FILE,
+        ]
+        self.expected_output_options = [
+            "-map", "{n}:v".format(n=self.segment.input_stream)
+        ]
+    
+    def test_init(self):
+        """Test segment initialises correctly."""
+        super().test_init()
+        self.assertEqual(
+            self.segment.frame_number, self.EXPECTED_FRAME_NUMBER,
+            msg="frame number = {v}".format(v=self.EXPECTED_FRAME_NUMBER))
+        self.assertEqual(
+            Segment._input_files[self.EXPECTED_INPUT_FILE],
+            self.expected_input_options[:4],
+            msg="input file {f}: {v}".format(
+                f=self.EXPECTED_INPUT_FILE,
+                v=self.expected_input_options[:4]))
+    
+    # Tricky to test generate_temp_file() because it uses pexpect.
+    # use_frame() relies on the output from generate_temp_frame()
+    # or generate_frame().
+
+    # def test_use_frame(self):
+    #     self.segment.use_frame()
+    #     pass
+    
+    def test_input_stream_specifier(self):
+        """Test that input stream specifier is correctly generated."""
+        expected_specifier = "[{n}:v]".format(
+            n=tuple(Segment._input_files).index(self.segment.input_file))
+        self.assertEqual(
+            self.segment.input_stream_specifier(), expected_specifier)
+
+    def test_output_stream_specifier(self):
+        """Test that output stream specifier is correctly generated."""
+        expected_specifier = "[{n}:v]".format(
+            n=tuple(Segment._input_files).index(self.segment.input_file))
+        self.assertEqual(
+            self.segment.output_stream_specifier(), expected_specifier)
+    
+    def test_trim_filter(self):
+        """Test that the trim filter is correctly generated."""
+        self.assertEqual(self.segment.trim_filter(), "")
+    
+
+# Remove SegmentSharedTestCase from the namespace so we don't run
+# the shared tests twice. See <https://stackoverflow.com/a/22836015>.
+del(SegmentSharedTestCase)