diff --git a/tests/test_analytics.py b/tests/test_analytics.py
new file mode 100644
index 0000000..4faebfe
--- /dev/null
+++ b/tests/test_analytics.py
@@ -0,0 +1,276 @@
+import datetime as dt
+import json
+import os
+
+import pytest  # type: ignore
+
+from analytix import YouTubeAnalytics
+from analytix.errors import *
+
+
+@pytest.fixture()
+def client():
+    client = YouTubeAnalytics.from_file("./secrets/secrets.json")
+    client.authorise()
+    return client
+
+
+def test_client(client):
+    with open("./secrets/secrets.json", mode="r", encoding="utf-8") as f:
+        project_id = json.load(f)["installed"]["project_id"]
+    assert client.project_id == project_id
+
+
+def test_reports_shape(client):
+    report = client.retrieve(
+        dt.date(2021, 1, 1), dt.date(2021, 2, 28), dimensions=("day",)
+    )
+    assert report.shape == (59, 36)
+
+
+def test_reports_max_results(client):
+    report = client.retrieve(
+        dt.date(2021, 1, 1),
+        dt.date(2021, 2, 28),
+        dimensions=("day",),
+        max_results=20,
+    )
+    assert report.shape == (20, 36)
+
+
+def test_reports_sort(client):
+    import numpy as np
+
+    report = client.retrieve(
+        dt.date(2021, 1, 1),
+        dt.date(2021, 2, 28),
+        dimensions=("day",),
+        sort_by=("views",),
+    )
+    assert np.array_equal(report.rows[:, 1], np.sort(report.rows[:, 1]))
+
+
+def test_reports_verify(client):
+    # TODO: Add input verification tests
+    # Deprecated
+    with pytest.raises(Deprecated) as exc:
+        report = client.retrieve(
+            dt.date(2021, 1, 1), dimensions=("7DayTotals",)
+        )
+
+    # Start date
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve("2020/1/1", dimensions=("day",))
+    assert str(exc.value).startswith("expected start date as date object")
+
+    # End date
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), "2020/1/1")
+    assert str(exc.value).startswith("expected end date as date object")
+
+    # End date > start date
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), dt.date(2019, 1, 1))
+    assert str(exc.value).startswith(
+        "the start date should be earlier than the end date"
+    )
+
+    # End date = start date
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), dt.date(2020, 1, 1))
+    assert str(exc.value).startswith(
+        "the start date should be earlier than the end date"
+    )
+
+    # Invalid currency
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), currency="ZZZ")
+    assert str(exc.value).startswith(
+        "expected existing currency as ISO 4217 alpha-3 code"
+    )
+
+    # Non-iterable dimension
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), dimensions="day")
+    assert str(exc.value).startswith(
+        "expected tuple, list, or set of dimensions"
+    )
+
+    # Non-dict filters
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), filters="country==US")
+    assert str(exc.value).startswith("expected dict of filters")
+
+    # Non-bool historical
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(
+            dt.date(2020, 1, 1), include_historical_data=1
+        )
+    assert str(exc.value).startswith(
+        "expected bool for 'include_historical_data'"
+    )
+
+    # Non-int max results
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), max_results="5")
+    assert str(exc.value).startswith("expected int for 'max_results'")
+
+    # Start index too low
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), max_results=-1)
+    assert str(exc.value).startswith(
+        "the maximum number of results should be no less than 0 (0 for unlimited results)"
+    )
+
+    # Non-iterable sort
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(
+            dt.date(2020, 1, 1), dimensions=("day",), sort_by="views"
+        )
+    assert str(exc.value).startswith(
+        "expected tuple, list, or set of sorting columns"
+    )
+
+    # Non-int start index
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), start_index="5")
+    assert str(exc.value).startswith("expected int for 'start_index'")
+
+    # Start index too low
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2020, 1, 1), start_index=0)
+    assert str(exc.value).startswith(
+        "the start index should be no less than 1"
+    )
+
+    # Non-iterable metrics
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(
+            dt.date(2020, 1, 1), dimensions=("day",), metrics="views"
+        )
+    assert str(exc.value).startswith("expected tuple, list, or set of metrics")
+
+    # Invalid dimension
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(dt.date(2021, 1, 1), dimensions=("test",))
+    assert str(exc.value).startswith(
+        "one or more dimensions you provided are invalid"
+    )
+
+    # Unsupported dimension
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(
+            dt.date(2021, 1, 1), dimensions=("day", "country")
+        )
+    assert str(exc.value).startswith(
+        "one or more dimensions you provided are not supported by the selected report type"
+    )
+
+    # Invalid filter
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(
+            dt.date(2021, 1, 1),
+            dimensions=("day",),
+            filters={"test": "invalid"},
+        )
+    assert str(exc.value).startswith(
+        "one or more filters you provided are invalid"
+    )
+
+    # Unsupported filter
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(
+            dt.date(2021, 1, 1),
+            dimensions=("country",),
+            filters={"province": "US-OH"},
+        )
+    assert str(exc.value).startswith(
+        "one or more filters you provided are not supported by the selected report type"
+    )
+
+    # Invalid filter value
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(
+            dt.date(2021, 1, 1),
+            dimensions=("day",),
+            filters={"province": "US-XX"},
+        )
+    assert "is not a valid value for filter" in str(exc.value)
+
+    # Invalid metric
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(
+            dt.date(2021, 1, 1),
+            dimensions=("day",),
+            # Where "not" is the invalid metric, of course
+            metrics=("jax", "is", "not", "cute"),
+        )
+    assert str(exc.value).startswith(
+        "one or more metrics you provided are invalid"
+    )
+
+    # Unsupported metric
+    with pytest.raises(InvalidRequest) as exc:
+        report = client.retrieve(
+            dt.date(2021, 1, 1),
+            dimensions=("subscribedStatus",),
+            metrics=("views", "likes", "comments"),
+        )
+    assert str(exc.value).startswith(
+        "one or more metrics you provided are not supported by the selected report type"
+    )
+
+    # Required dimension
+    # Required filter
+    # Exactly one dimension
+    # Exactly one filter
+    # One or more dimension
+    # One or more filter
+    # Optional dimension
+    # Optional filter
+    # Zero or one dimension
+    # Zero or one filter
+
+
+def test_report_types(client):
+    try:
+        type = "Basic user activity"
+        report = client.retrieve(dt.date(2021, 1, 1))
+        assert report.type == type
+        type = "Basic user activity (US)"
+        report = client.retrieve(
+            dt.date(2021, 1, 1), filters={"province": "US-OH"}
+        )
+        assert report.type == type
+    except (InvalidRequest, HTTPError) as exc:
+        assert False, f"{type} report raised: {exc}"
+
+
+def test_dataframe_datetime(client):
+    import numpy as np
+    import pandas as pd
+
+    report = client.retrieve(
+        dt.date(2021, 1, 1), dt.date(2021, 2, 28), dimensions=("day",)
+    )
+    df = report.to_dataframe()
+    assert df.shape == (59, 36)
+    assert pd.api.types.is_datetime64_ns_dtype(df["day"])
+
+    report = client.retrieve(
+        dt.date(2021, 1, 1), dt.date(2021, 2, 1), dimensions=("month",)
+    )
+    df = report.to_dataframe()
+    assert df.shape == (2, 36)
+    assert pd.api.types.is_datetime64_ns_dtype(df["month"])
+
+
+def test_files_csv(client):
+    report = client.retrieve(
+        dt.date(2021, 1, 1), dt.date(2021, 2, 28), dimensions=("day",)
+    )
+    report.to_csv("./test.csv")
+    with open("./test.csv", mode="r", encoding="utf-8") as f:
+        assert len(f.readlines()) == 60
+
+    os.remove("./test.csv")