diff --git a/scripts/regress.py b/scripts/regress.py
index 6ce034a0..cb4ae6a9 100644
--- a/scripts/regress.py
+++ b/scripts/regress.py
@@ -83,7 +83,14 @@ SMOKE_COMMANDS = (
 NIGHTLY_EXTRA_COMMANDS = (
     (
         "configs/benchmark/ihp130-hazard3-coremark.mk",
-        ("SIMU=VERILATOR", "HAVE_SVA=YES", "coremark-report"),
+        # The quick-mode serial-flash boot plus benchmark needs ~33M emu cycles;
+        # hosted runners reach only ~15k cycles/s, far below the 180s default.
+        (
+            "SIMU=VERILATOR",
+            "SOC_SIM_TIME=3600",
+            "HAVE_SVA=YES",
+            "coremark-report",
+        ),
     ),
     ("configs/ci/ihp130.mk", ("SYNTH=YOSYS", "SYNTH_RECIPE=area", "synth")),
     ("configs/ci/ihp130.mk", ("STA=OPENSTA", "SYNTH_RECIPE=area", "sta")),
diff --git a/tests/test_script_tools.py b/tests/test_script_tools.py
index 6621c6ee..5acd6be5 100644
--- a/tests/test_script_tools.py
+++ b/tests/test_script_tools.py
@@ -1041,6 +1041,8 @@ def test_verilator_simulations_use_uniform_timeout() -> None:
                 assert simulation_timeout == ["SOC_SIM_TIME=360"]
                 assert "LINK_TYPE=ld2_all_sram" in values
                 assert "VERILATOR_SIM_ARGS=--fast-flash" in values
+            elif "coremark-report" in values:
+                assert simulation_timeout == ["SOC_SIM_TIME=3600"]
             else:
                 assert not simulation_timeout
             if "debug-sim" not in values:
@@ -1391,8 +1393,8 @@ def test_nightly_extra_regression_skips_pr_netsim() -> None:
         "--dry-run",
     )
     assert (
-        "+ make CONFIG=configs/benchmark/ihp130-hazard3-coremark.mk SIMU=VERILATOR HAVE_SVA=YES coremark-report"
-        in extra.stdout
+        "+ make CONFIG=configs/benchmark/ihp130-hazard3-coremark.mk "
+        "SIMU=VERILATOR SOC_SIM_TIME=3600 HAVE_SVA=YES coremark-report" in extra.stdout
     )
     assert "+ make CONFIG=configs/ci/ihp130.mk SYNTH=YOSYS SYNTH_RECIPE=area synth" in extra.stdout
     assert "+ make CONFIG=configs/ci/ihp130.mk STA=OPENSTA SYNTH_RECIPE=area sta" in extra.stdout