diff --git a/src/model_config_tests/qa/test_access_om3_config.py b/src/model_config_tests/qa/test_access_om3_config.py
index 05aeb47..4243bca 100644
--- a/src/model_config_tests/qa/test_access_om3_config.py
+++ b/src/model_config_tests/qa/test_access_om3_config.py
@@ -3,12 +3,75 @@
 
 """ACCESS-OM3 specific configuration tests"""
 
+import re
+from pathlib import Path
+
 import pytest
+from payu.models.cesm_cmeps import Runconfig
+
+#########################
+# Valid field constants #
+#########################
+
+# Error message functions
+
+
+def error_runconfig_variable_none(section: str, variable: str) -> str:
+    return f"nuopc.runconfig: section '{section}' variable {variable} does not exist."
+
+
+def error_runseq_variable_none(variable: str) -> str:
+    return f"nuopc.runseq: {variable} does not exist."
+
+
+################################
+# ACCESS-OM3-specific Fixtures #
+################################
+
+
+@pytest.fixture(scope="class")
+def nuopc_runconfig(control_path: Path) -> Runconfig:
+    runconfig_path: Path = control_path / "nuopc.runconfig"
+
+    return Runconfig(runconfig_path)
+
+
+@pytest.fixture(scope="class")
+def nuopc_runseq(control_path: Path) -> list[str]:
+    runseq_path: Path = control_path / "nuopc.runseq"
+
+    with open(runseq_path) as f:
+        # FIXME: Find something better
+        return f.readlines()
+
+
+#########
+# Tests #
+#########
 
 
 @pytest.mark.access_om3
 class TestAccessOM3:
     """ACCESS-OM3 Specific configuration and metadata tests"""
 
-    def test_pass(self):
-        pass
+    def test_runconfig_ocn_cpl_dt_equals_runseq_coupling_timestep(
+        self, nuopc_runconfig: Runconfig, nuopc_runseq: list[str]
+    ):
+        # Setup runconfig variable
+        rcfg_section = "CLOCK_attributes"
+        rcfg_variable = "ocn_cpl_dt"
+        rcfg_ocn_cpl_dt = nuopc_runconfig.get(rcfg_section, rcfg_variable)
+
+        assert rcfg_ocn_cpl_dt, error_runconfig_variable_none(
+            rcfg_section, rcfg_variable
+        )
+
+        # Setup runseq variable
+        rseq_cpl_ts_match: str = [
+            line for line in nuopc_runseq if re.match(r"@(\S*)", line)
+        ][0]
+        rseq_cpl_ts = rseq_cpl_ts_match.group(1)
+
+        assert rseq_cpl_ts, error_runseq_variable_none("coupling timestep")
+
+        assert rcfg_ocn_cpl_dt == rseq_cpl_ts