diff --git a/tests/test_core/test_config.py b/tests/test_core/test_config.py
new file mode 100644
index 0000000..79388d7
--- /dev/null
+++ b/tests/test_core/test_config.py
@@ -0,0 +1,58 @@
+"""Tests for configuration module."""
+
+from pathlib import Path
+
+import pytest
+
+from veritext.core.config import VeritextSettings, get_settings
+
+
+class TestVeritextSettings:
+    def test_default_log_level(self) -> None:
+        settings = VeritextSettings()
+        assert settings.log_level == "INFO"
+
+    def test_default_log_format(self) -> None:
+        settings = VeritextSettings()
+        assert settings.log_format == "console"
+
+    def test_default_benchmark_path(self) -> None:
+        settings = VeritextSettings()
+        assert settings.benchmark_storage_path == Path("benchmarks")
+
+    def test_default_tokeniser_lowercase(self) -> None:
+        settings = VeritextSettings()
+        assert settings.tokeniser_lowercase is True
+
+    def test_default_remove_punctuation(self) -> None:
+        settings = VeritextSettings()
+        assert settings.tokeniser_remove_punctuation is True
+
+    def test_default_semantic_model(self) -> None:
+        settings = VeritextSettings()
+        assert settings.semantic_model == "all-MiniLM-L6-v2"
+
+    def test_default_semantic_cache_enabled(self) -> None:
+        settings = VeritextSettings()
+        assert settings.semantic_cache_embeddings is True
+
+    def test_env_var_override(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        monkeypatch.setenv("VERITEXT_LOG_LEVEL", "DEBUG")
+        settings = VeritextSettings()
+        assert settings.log_level == "DEBUG"
+
+    def test_env_var_override_log_format(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        monkeypatch.setenv("VERITEXT_LOG_FORMAT", "json")
+        settings = VeritextSettings()
+        assert settings.log_format == "json"
+
+
+class TestGetSettings:
+    def test_get_settings_returns_instance(self) -> None:
+        settings = get_settings()
+        assert isinstance(settings, VeritextSettings)
+
+    def test_get_settings_returns_valid_defaults(self) -> None:
+        settings = get_settings()
+        assert settings.log_level in ("DEBUG", "INFO", "WARNING", "ERROR")
+        assert settings.log_format in ("console", "json")
diff --git a/tests/test_core/test_logging.py b/tests/test_core/test_logging.py
new file mode 100644
index 0000000..e5bd1c0
--- /dev/null
+++ b/tests/test_core/test_logging.py
@@ -0,0 +1,45 @@
+"""Tests for logging module."""
+
+from veritext.core.logging import configure_logging, get_logger
+
+
+class TestGetLogger:
+    def test_get_logger_returns_logger(self) -> None:
+        logger = get_logger()
+        assert logger is not None
+
+    def test_get_logger_default_name(self) -> None:
+        logger = get_logger()
+        # The logger should be a bound logger from structlog
+        assert hasattr(logger, "info")
+        assert hasattr(logger, "debug")
+        assert hasattr(logger, "warning")
+        assert hasattr(logger, "error")
+
+    def test_get_logger_custom_name(self) -> None:
+        logger = get_logger("custom.module")
+        assert logger is not None
+        assert hasattr(logger, "info")
+
+
+class TestConfigureLogging:
+    def test_configure_logging_console_format(self) -> None:
+        configure_logging(level="INFO", log_format="console")
+        logger = get_logger()
+        assert logger is not None
+
+    def test_configure_logging_json_format(self) -> None:
+        configure_logging(level="DEBUG", log_format="json")
+        logger = get_logger()
+        assert logger is not None
+
+    def test_configure_logging_uses_defaults(self) -> None:
+        configure_logging()
+        logger = get_logger()
+        assert logger is not None
+
+    def test_configure_logging_different_levels(self) -> None:
+        for level in ("DEBUG", "INFO", "WARNING", "ERROR"):
+            configure_logging(level=level)
+            logger = get_logger()
+            assert logger is not None