diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d865dc7..9259a727 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,7 +12,7 @@
 ### Fixed (not changing behavior/API/variables/...)
 
 ### Infrastructure
-- [[PR 114]](https://github.com/parthenon-hpc-lab/athenapk/pull/109) Bump Parthenon to latest develop (2024-05-29)
+- [[PR 114]](https://github.com/parthenon-hpc-lab/athenapk/pull/114) Bump Parthenon 24.08 and Kokkos to 4.4.00
 - [[PR 112]](https://github.com/parthenon-hpc-lab/athenapk/pull/112) Add dev container configuration
 - [[PR 105]](https://github.com/parthenon-hpc-lab/athenapk/pull/105) Bump Parthenon to latest develop (2024-03-13)
 - [[PR 84]](https://github.com/parthenon-hpc-lab/athenapk/pull/84) Added `CHANGELOG.md`
@@ -20,10 +20,12 @@
 ### Removed (removing behavior/API/varaibles/...)
 
 ### Incompatibilities (i.e. breaking changes)
-- [[PR 114]](https://github.com/parthenon-hpc-lab/athenapk/pull/109) Bump Parthenon to latest develop (2024-05-29)
+- [[PR 114]](https://github.com/parthenon-hpc-lab/athenapk/pull/114) Bump Parthenon 24.08 and Kokkos to 4.4.00
   - Changed signature of `UserWorkBeforeOutput` to include `SimTime` as last paramter
   - Fixes bitwise idential restarts for AMR simulations (the derefinement counter is now included)
   - Order of operations in flux-correction has changed (expect round-off error differences to previous results for AMR sims)
+  - History outputs now carry the output block number, i.e., a file previously called parthenon.hst might now be called parthenon.out1.hst
+  - History outputs now contain two additional columns (cycle number and meshblock counts), which changes/shifts the column indices (hint: use the column headers to parse the contents and do not rely on fixed indices as they may also vary between different pgen due to custom/pgen-dependent content in the history file)
 - [[PR 97]](https://github.com/parthenon-hpc-lab/athenapk/pull/97)
   - Removes original `schure.cooling` cooling curve as it had unknown origin.
   - To avoid confusion, only cooling table for a single solar metallicity are supported
diff --git a/tst/regression/test_suites/field_loop/field_loop.py b/tst/regression/test_suites/field_loop/field_loop.py
index b752f535..0eebbb6d 100644
--- a/tst/regression/test_suites/field_loop/field_loop.py
+++ b/tst/regression/test_suites/field_loop/field_loop.py
@@ -135,7 +135,7 @@ def Analyse(self, parameters):
 
         for step in range(len(all_cfgs)):
             outname = get_outname(all_cfgs[step])
-            data_filename = f"{parameters.output_path}/{outname}.hst"
+            data_filename = f"{parameters.output_path}/{outname}.out1.hst"
             data = np.genfromtxt(data_filename)
 
             res, method = all_cfgs[step]
diff --git a/tst/regression/test_suites/turbulence/turbulence.py b/tst/regression/test_suites/turbulence/turbulence.py
index eddbd38e..154ba3d4 100644
--- a/tst/regression/test_suites/turbulence/turbulence.py
+++ b/tst/regression/test_suites/turbulence/turbulence.py
@@ -40,7 +40,7 @@ def Analyse(self, parameters):
 
         success = True
 
-        data_filename = f"{parameters.output_path}/parthenon.hst"
+        data_filename = f"{parameters.output_path}/parthenon.out1.hst"
         data = np.genfromtxt(data_filename)
 
         # Check Ms