diff --git a/README.md b/README.md
index aa1a909..161763a 100644
--- a/README.md
+++ b/README.md
@@ -113,7 +113,7 @@ jobs:
       - name: Run benchmarks
         uses: CodSpeedHQ/action@v4
         with:
-          mode: instrumentation # or `walltime`
+          mode: simulation # or `walltime`
           token: ${{ secrets.CODSPEED_TOKEN }}
           run: pytest tests/ --codspeed
 ```
diff --git a/pyproject.toml b/pyproject.toml
index 0ab2879..a97fcb6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,6 +45,8 @@ compat = [
 ]
 
 [tool.uv]
+# Python builds change with uv versions, and we are quite susceptible to that.
+# We pin uv to to make sure reproducibility is maintained for any contributor.
 required-version = "0.9.5"
 
 [tool.uv.sources]
diff --git a/src/pytest_codspeed/instruments/__init__.py b/src/pytest_codspeed/instruments/__init__.py
index 71936db..08dace3 100644
--- a/src/pytest_codspeed/instruments/__init__.py
+++ b/src/pytest_codspeed/instruments/__init__.py
@@ -56,9 +56,16 @@ def get_result_dict(
 
 
 class MeasurementMode(str, Enum):
-    Instrumentation = "instrumentation"
+    Simulation = "simulation"
     WallTime = "walltime"
 
+    @classmethod
+    def _missing_(cls, value: object):
+        # Accept "instrumentation" as deprecated alias for "simulation"
+        if value == "instrumentation":
+            return cls.Simulation
+        return None
+
 
 def get_instrument_from_mode(mode: MeasurementMode) -> type[Instrument]:
     from pytest_codspeed.instruments.valgrind import (
@@ -66,7 +73,7 @@ def get_instrument_from_mode(mode: MeasurementMode) -> type[Instrument]:
     )
     from pytest_codspeed.instruments.walltime import WallTimeInstrument
 
-    if mode == MeasurementMode.Instrumentation:
+    if mode == MeasurementMode.Simulation:
         return ValgrindInstrument
     else:
         return WallTimeInstrument
diff --git a/src/pytest_codspeed/instruments/hooks/__init__.py b/src/pytest_codspeed/instruments/hooks/__init__.py
index 19aea91..3a852d6 100644
--- a/src/pytest_codspeed/instruments/hooks/__init__.py
+++ b/src/pytest_codspeed/instruments/hooks/__init__.py
@@ -78,5 +78,5 @@ def set_integration(self, name: str, version: str) -> None:
             warnings.warn("Failed to set integration name and version", RuntimeWarning)
 
     def is_instrumented(self) -> bool:
-        """Check if instrumentation is active."""
+        """Check if simulation is active."""
         return self.lib.instrument_hooks_is_instrumented(self.instance)
diff --git a/src/pytest_codspeed/instruments/valgrind.py b/src/pytest_codspeed/instruments/valgrind.py
index f604d1f..b6667f8 100644
--- a/src/pytest_codspeed/instruments/valgrind.py
+++ b/src/pytest_codspeed/instruments/valgrind.py
@@ -39,7 +39,7 @@ def __init__(self, config: CodSpeedConfig) -> None:
 
     def get_instrument_config_str_and_warns(self) -> tuple[str, list[str]]:
         config = (
-            f"mode: instrumentation, "
+            f"mode: simulation, "
             f"callgraph: {'enabled' if SUPPORTS_PERF_TRAMPOLINE else 'not supported'}"
         )
         warnings = []
diff --git a/src/pytest_codspeed/plugin.py b/src/pytest_codspeed/plugin.py
index 26a0ca1..0d2853b 100644
--- a/src/pytest_codspeed/plugin.py
+++ b/src/pytest_codspeed/plugin.py
@@ -115,7 +115,7 @@ def pytest_configure(config: pytest.Config):
         if os.environ.get("CODSPEED_RUNNER_MODE") == "walltime":
             default_mode = MeasurementMode.WallTime.value
         else:
-            default_mode = MeasurementMode.Instrumentation.value
+            default_mode = MeasurementMode.Simulation.value
     else:
         default_mode = MeasurementMode.WallTime.value
 
diff --git a/tests/test_pytest_plugin.py b/tests/test_pytest_plugin.py
index 89cd7b1..452e9da 100644
--- a/tests/test_pytest_plugin.py
+++ b/tests/test_pytest_plugin.py
@@ -34,7 +34,7 @@ def test_bench_enabled_header_without_perf(
     with codspeed_env():
         result = pytester.runpytest()
     result.stdout.fnmatch_lines(
-        ["codspeed: * (enabled, mode: instrumentation, callgraph: not supported)"]
+        ["codspeed: * (enabled, mode: simulation, callgraph: not supported)"]
     )
 
 
diff --git a/tests/test_pytest_plugin_cpu_instrumentation.py b/tests/test_pytest_plugin_cpu_instrumentation.py
index 4856ae6..ee0eca8 100644
--- a/tests/test_pytest_plugin_cpu_instrumentation.py
+++ b/tests/test_pytest_plugin_cpu_instrumentation.py
@@ -21,7 +21,7 @@ def test_bench_enabled_header_with_perf(
     with codspeed_env():
         result = pytester.runpytest()
     result.stdout.fnmatch_lines(
-        ["codspeed: * (enabled, mode: instrumentation, callgraph: enabled)"]
+        ["codspeed: * (enabled, mode: simulation, callgraph: enabled)"]
     )
 
 
@@ -36,7 +36,7 @@ def _():
                 return 1 + 1
         """
     )
-    result = run_pytest_codspeed_with_mode(pytester, MeasurementMode.Instrumentation)
+    result = run_pytest_codspeed_with_mode(pytester, MeasurementMode.Simulation)
     result.stdout.fnmatch_lines(
         [
             (
@@ -132,7 +132,7 @@ def foo():
             benchmark.pedantic(foo, rounds=10, iterations=100)
         """
     )
-    result = run_pytest_codspeed_with_mode(pytester, MeasurementMode.Instrumentation)
+    result = run_pytest_codspeed_with_mode(pytester, MeasurementMode.Simulation)
     result.stdout.fnmatch_lines(
         [
             "*UserWarning: Valgrind instrument ignores rounds and iterations settings "
@@ -192,8 +192,6 @@ def target(a, b, c):
         """
     )
     with codspeed_env():
-        result = run_pytest_codspeed_with_mode(
-            pytester, MeasurementMode.Instrumentation
-        )
+        result = run_pytest_codspeed_with_mode(pytester, MeasurementMode.Simulation)
     assert result.ret == 0, "the run should have succeeded"
     result.assert_outcomes(passed=1)