diff --git a/sf-writer/test/test_JFH5Writer.cpp b/sf-writer/test/test_JFH5Writer.cpp
index 6c59869..838fc05 100644
--- a/sf-writer/test/test_JFH5Writer.cpp
+++ b/sf-writer/test/test_JFH5Writer.cpp
@@ -135,4 +135,23 @@ TEST(JFH5Writer, test_step_pulse_id)
 TEST(JFH5Writer, test_writing_with_step)
 {
     // TODO: Implement this test.
+}
+
+TEST(JFH5Writer, test_exceptions)
+{
+    // Should be ok.
+    ASSERT_NO_THROW(JFH5Writer("ignore.h5", 1, 1234, 1234, 1));
+    // Should be ok.
+    ASSERT_NO_THROW(JFH5Writer("ignore.h5", 1, 1234, 4567, 1));
+    // Should be ok.
+    ASSERT_NO_THROW(JFH5Writer("ignore.h5", 1, 4, 4, 4));
+
+    // stop smaller than start.
+    ASSERT_THROW(JFH5Writer("ignore.h5", 1, 1234, 1233, 1), runtime_error);
+    // step is not valid for 100Hz.
+    ASSERT_THROW(JFH5Writer("ignore.h5", 1, 1234, 1234, 3), runtime_error);
+    // start not divisible by step.
+    ASSERT_THROW(JFH5Writer("ignore.h5", 1, 10, 10, 4), runtime_error);
+    // stop not divisible by step
+    ASSERT_THROW(JFH5Writer("ignore.h5", 1, 8, 10, 4), runtime_error);
 }
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