diff --git a/shellhist/tests/test_time.py b/shellhist/tests/test_time.py
index 7093ada..4101da4 100644
--- a/shellhist/tests/test_time.py
+++ b/shellhist/tests/test_time.py
@@ -1 +1,66 @@
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\ No newline at end of file
+"""Tests for time analysis functionality."""
+
+from datetime import datetime, timedelta
+from io import StringIO
+
+
+from shellhist.core import HistoryEntry, HistoryStore
+
+
+class TestTimeUtils:
+    """Test time utility functions."""
+
+    def test_parse_time_range_hours(self):
+        """Test parsing hour-based time range."""
+        from shellhist.cli.time_analysis import _parse_time_range
+        
+        result = _parse_time_range("24h")
+        expected = datetime.now() - timedelta(hours=24)
+        
+        assert (result - expected).total_seconds() < 5
+
+    def test_parse_time_range_days(self):
+        """Test parsing day-based time range."""
+        from shellhist.cli.time_analysis import _parse_time_range
+        
+        result = _parse_time_range("7d")
+        expected = datetime.now() - timedelta(days=7)
+        
+        assert (result - expected).total_seconds() < 5
+
+    def test_parse_time_range_weeks(self):
+        """Test parsing week-based time range."""
+        from shellhist.cli.time_analysis import _parse_time_range
+        
+        result = _parse_time_range("2w")
+        expected = datetime.now() - timedelta(weeks=2)
+        
+        assert (result - expected).total_seconds() < 5
+
+
+class TestHourlyDistribution:
+    """Test hourly distribution analysis."""
+
+    def test_hourly_analysis(self):
+        """Test basic hourly distribution."""
+        from shellhist.cli.time_analysis import _analyze_hourly_distribution
+        from rich.console import Console
+        
+        store = HistoryStore()
+        now = datetime.now()
+        
+        for i in range(24):
+            entry = HistoryEntry(
+                command="test command",
+                timestamp=now.replace(hour=i),
+            )
+            store.add_entry(entry)
+        
+        console = Console()
+        output = StringIO()
+        console.file = output
+        
+        _analyze_hourly_distribution(console, list(store.entries))
+        
+        result = output.getvalue()
+        assert "Hourly Command Distribution" in result