diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53e78b0abe45..5dcbd840eb5d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@
 - [[PR 868]](https://github.com/parthenon-hpc-lab/parthenon/pull/868) Add block-local face, edge, and nodal fields and allow for packing
 
 ### Changed (changing behavior/API/variables/...)
+- [[PR 965]](https://github.com/parthenon-hpc-lab/parthenon/pull/965) Allow leading whitespace in input parameters
 - [[PR 926]](https://github.com/parthenon-hpc-lab/parthenon/pull/926) Internal refinement op registration
 - [[PR 897]](https://github.com/parthenon-hpc-lab/parthenon/pull/897) Deflate compression filter is not called any more if compression is soft disabled
 - [[PR 896]](https://github.com/parthenon-hpc-lab/parthenon/pull/896) Update Kokkos integration to support installed version. Use `serial` (flat MPI) host parallelization by default (instead of OpenMP)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 33c19c34256d..fe9b1f7e3d86 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,9 +62,9 @@ include(cmake/Format.cmake)
 include(cmake/Lint.cmake)
 
 # regression test reference data
-set(REGRESSION_GOLD_STANDARD_VER 19 CACHE STRING "Version of gold standard to download and use")
+set(REGRESSION_GOLD_STANDARD_VER 20 CACHE STRING "Version of gold standard to download and use")
 set(REGRESSION_GOLD_STANDARD_HASH
-  "SHA512=e1d1a06b9cf9b761d42d0b6b241056ac75658db90138b6b867b1ca7ead4308af4f980285af092b40aee1dbbfb68b4e8cb15efcc9b83d7930c18bf992ae95c729"
+  "SHA512=e5e421f3c0be01e4708965542bb8b1b79b5c96de97091e46972e375c7616588d026a9a8e29226d9c7ef75346bc859fd9af72acdc7e95e0d783b5ef29aa4630b1"
   CACHE STRING "Hash of default gold standard file to download")
 option(REGRESSION_GOLD_STANDARD_SYNC "Automatically sync gold standard files." ON)
 
diff --git a/src/outputs/parthenon_hdf5.cpp b/src/outputs/parthenon_hdf5.cpp
index 95b89b93b627..004054d8421a 100644
--- a/src/outputs/parthenon_hdf5.cpp
+++ b/src/outputs/parthenon_hdf5.cpp
@@ -820,7 +820,7 @@ HDF5GetAttributeInfo(hid_t location, const std::string &name, H5A &attr) {
 // template specializations for std::string and bool
 void HDF5WriteAttribute(const std::string &name, const std::string &value,
                         hid_t location) {
-  HDF5WriteAttribute(name, value.size(), value.c_str(), location);
+  HDF5WriteAttribute(name, value.c_str(), location);
 }
 
 template <>
diff --git a/src/parameter_input.cpp b/src/parameter_input.cpp
index b9fd9546f2b6..45012e0912bd 100644
--- a/src/parameter_input.cpp
+++ b/src/parameter_input.cpp
@@ -315,7 +315,7 @@ bool ParameterInput::ParseLine(InputBlock *pib, std::string line, std::string &n
     name.assign(line, first_char, len);
     last_char = name.find_last_not_of(" ");
     name.erase(last_char + 1, std::string::npos);
-    line.erase(0, len + 1);
+    line.erase(0, equal_char + 1);
   }
 
   cont_char = line.find_first_of("&"); // find "&" continuation character
diff --git a/tst/regression/test_suites/advection_performance/parthinput.advection_performance b/tst/regression/test_suites/advection_performance/parthinput.advection_performance
index 4dfe731cf497..5aea8cbee069 100644
--- a/tst/regression/test_suites/advection_performance/parthinput.advection_performance
+++ b/tst/regression/test_suites/advection_performance/parthinput.advection_performance
@@ -49,8 +49,8 @@ nx2 = 64
 nx3 = 64
 
 <parthenon/time>
-tlim = 1.0
-nlim = 20
+ tlim = 1.0 # Test that leading whitespace is correctly sanitized
+	nlim = 20 # Test that leading tab is correctly sanitized
 integrator = rk2
 perf_cycle_offset = 2