diff --git a/components/eamxx/src/physics/nudging/tests/nudging_tests.cpp b/components/eamxx/src/physics/nudging/tests/nudging_tests.cpp
index 51773cb249d..a5a158f44a1 100644
--- a/components/eamxx/src/physics/nudging/tests/nudging_tests.cpp
+++ b/components/eamxx/src/physics/nudging/tests/nudging_tests.cpp
@@ -51,7 +51,7 @@ TEST_CASE("nudging_tests") {
   const int nlevs_fine  = 2*nlevs_data -1;
 
   // Files names
-  auto postfix = ".INSTANT.nsteps_x1." + get_t0().to_string() + ".nc";
+  auto postfix = ".INSTANT.nsteps_x1.np*." + get_t0().to_string() + ".nc";
   auto nudging_data        = "nudging_data" + postfix;
   auto nudging_data_filled = "nudging_data_filled" + postfix;
   auto map_file = "map_ncol" + std::to_string(ngcols_data)
diff --git a/components/eamxx/src/share/io/scream_io_utils.cpp b/components/eamxx/src/share/io/scream_io_utils.cpp
index 4a0beb813b7..9318728d657 100644
--- a/components/eamxx/src/share/io/scream_io_utils.cpp
+++ b/components/eamxx/src/share/io/scream_io_utils.cpp
@@ -2,8 +2,10 @@
 
 #include "share/io/scream_scorpio_interface.hpp"
 #include "share/util/scream_utils.hpp"
+#include "share/scream_config.hpp"
 
 #include <fstream>
+#include <regex>
 
 namespace scream {
 
@@ -11,37 +13,49 @@ std::string find_filename_in_rpointer (
     const std::string& filename_prefix,
     const bool model_restart,
     const ekat::Comm& comm,
-    const util::TimeStamp& run_t0)
+    const util::TimeStamp& run_t0,
+    const OutputAvgType avg_type,
+    const IOControl& control)
 {
   std::string filename;
   bool found = false;
   std::string content;
   std::string suffix = model_restart ? ".r." : ".rhist.";
+  std::string pattern_str = filename_prefix + suffix;
+
+  // The AD will pass a default constructed control, since it doesn't know the values
+  // of REST_N/REST_OPTION used in the previous run. Also, model restart is *always* INSTANT.
+  if (model_restart) {
+    EKAT_REQUIRE_MSG (avg_type==OutputAvgType::Instant,
+        "Error! Model restart output should have INSTANT avg type.\n"
+        " - input avg_type: " + e2str(avg_type) + "\n");
+    pattern_str += e2str(OutputAvgType::Instant) + R"(.n(step|sec|min|hour|day|month|year)s_x\d+)";
+  } else {
+    EKAT_REQUIRE_MSG (control.output_enabled(),
+        "Error! When restarting an output stream, we need a valid IOControl structure.\n"
+        " - filename prefix: " + filename_prefix + "\n");
+    pattern_str += e2str(avg_type) + "." + control.frequency_units + "_x" + std::to_string(control.frequency);
+  }
+  if (is_scream_standalone()) {
+    pattern_str += ".np" + std::to_string(comm.size());
+  }
+  pattern_str += "." + run_t0.to_string() + ".nc";
+  std::regex pattern (pattern_str);
+
   if (comm.am_i_root()) {
     std::ifstream rpointer_file;
+
     std::string line;
     rpointer_file.open("rpointer.atm");
 
-    // If the timestamp is in the filename, then the filename ends with "S.nc",
-    // with S being the string representation of the timestamp
-    auto ts_len = run_t0.to_string().size();
-    auto extract_ts = [&] (const std::string& line) -> util::TimeStamp {
-      auto min_size = ts_len+3;
-      if (line.size()>=min_size) {
-        auto ts_str = line.substr(line.size()-min_size,ts_len);
-        auto ts = util::str_to_time_stamp(ts_str);
-        return ts;
-      } else {
-        return util::TimeStamp();
-      }
-    };
-
-    while ((rpointer_file >> line) and not found) {
+    while (std::getline(rpointer_file,line)) {
       content += line + "\n";
 
-      found = line.find(filename_prefix+suffix) != std::string::npos &&
-              extract_ts(line)==run_t0;
-      filename = line;
+      if (std::regex_search(line,pattern)) {
+        filename = line;
+        found = true;
+        break;
+      }
     }
   }
 
@@ -52,18 +66,29 @@ std::string find_filename_in_rpointer (
   if (not found) {
     broadcast_string(content,comm,comm.root_rank());
 
-    // If the history restart file is not found, it must be because the last
-    // model restart step coincided with a model output step, in which case
-    // a restart history file is not written.
-    // If that's the case, *disable* output restart, by setting
-    //   'Restart'->'Perform Restart' = false
-    // in the input parameter list
-    EKAT_ERROR_MSG (
-        "Error! Restart requested, but no restart file found in 'rpointer.atm'.\n"
-        "   restart filename prefix: " + filename_prefix + "\n"
-        "   restart file type: " + std::string(model_restart ? "model restart" : "history restart") + "\n"
-        "   run t0           : " + run_t0.to_string() + "\n"
-        "   rpointer content:\n" + content);
+    if (model_restart) {
+      EKAT_ERROR_MSG (
+          "Error! Restart requested, but no model restart file found in 'rpointer.atm'.\n"
+          "   model restart filename prefix: " + filename_prefix + "\n"
+          "   model restart filename pattern: " + pattern_str + "\n"
+          "   run t0           : " + run_t0.to_string() + "\n"
+          "   rpointer content:\n" + content + "\n\n");
+    } else {
+      EKAT_ERROR_MSG (
+          "Error! Restart requested, but no history restart file found in 'rpointer.atm'.\n"
+          "   hist restart filename prefix: " + filename_prefix + "\n"
+          "   hist restart filename pattern: " + pattern_str + "\n"
+          "   run t0           : " + run_t0.to_string() + "\n"
+          "   avg_type         : " + e2str(avg_type) + "\n"
+          "   output freq      : " + std::to_string(control.frequency) + "\n"
+          "   output freq units: " + control.frequency_units + "\n"
+          "   rpointer content:\n" + content + "\n\n"
+          " Did you change output specs (avg type, freq, or freq units) across restart? If so, please, remember that it is not allowed.\n"
+          " It is also possible you are using a rhist file create before commit 6b7d441330d. That commit changed how rhist file names\n"
+          " are formed. In particular, we no longer use INSTANT.${REST_OPTION}_x${REST_N}, but we use the avg type, and freq/freq_option\n"
+          " of the output stream (to avoid name clashes if 2 streams only differ for one of those). If you want to use your rhist file,\n"
+          " please rename it, so that the avg-type, freq, and freq_option reflect those of the output stream.\n");
+    }
   }
 
   // Have the root rank communicate the nc filename
diff --git a/components/eamxx/src/share/io/scream_io_utils.hpp b/components/eamxx/src/share/io/scream_io_utils.hpp
index efb2a4fd65b..01bc46e1e60 100644
--- a/components/eamxx/src/share/io/scream_io_utils.hpp
+++ b/components/eamxx/src/share/io/scream_io_utils.hpp
@@ -1,6 +1,7 @@
 #ifndef SCREAM_IO_UTILS_HPP
 #define SCREAM_IO_UTILS_HPP
 
+#include "scream_io_control.hpp"
 #include "share/util/scream_time_stamp.hpp"
 
 #include <ekat/util/ekat_string_utils.hpp>
@@ -59,11 +60,17 @@ inline OutputAvgType str2avg (const std::string& s) {
   return OAT::Invalid;
 }
 
+// The AD will pass a default constructed control, since it doesn't know the values
+// of REST_N/REST_OPTION used in the previous run
+// Output streams MUST pass a valid control structure, cause we need to differentiate
+// between, e.g., streams with same filename prefix, but different output freq specs
 std::string find_filename_in_rpointer (
-    const std::string& casename,
+    const std::string& filename_prefix,
     const bool model_restart,
     const ekat::Comm& comm,
-    const util::TimeStamp& run_t0);
+    const util::TimeStamp& run_t0,
+    const OutputAvgType avg_type = OutputAvgType::Instant,
+    const IOControl& control = {});
 
 struct LongNames {
 
diff --git a/components/eamxx/src/share/io/scream_output_manager.cpp b/components/eamxx/src/share/io/scream_output_manager.cpp
index 0b738efe648..4f35827ba3f 100644
--- a/components/eamxx/src/share/io/scream_output_manager.cpp
+++ b/components/eamxx/src/share/io/scream_output_manager.cpp
@@ -171,7 +171,9 @@ setup (const ekat::Comm& io_comm, const ekat::ParameterList& params,
 
     if (perform_history_restart) {
       using namespace scorpio;
-      auto rhist_file = find_filename_in_rpointer(hist_restart_filename_prefix,false,m_io_comm,m_run_t0);
+      IOFileSpecs hist_restart_specs;
+      hist_restart_specs.ftype = FileType::HistoryRestart;
+      auto rhist_file = find_filename_in_rpointer(hist_restart_filename_prefix,false,m_io_comm,m_run_t0,m_avg_type,m_output_control);
 
       scorpio::register_file(rhist_file,scorpio::Read);
       // From restart file, get the time of last write, as well as the current size of the avg sample
@@ -196,22 +198,8 @@ setup (const ekat::Comm& io_comm, const ekat::ParameterList& params,
 
       // We do NOT allow changing output specs across restart. If you do want to change
       // any of these, you MUST start a new output stream (e.g., setting 'Perform Restart: false')
-      auto old_freq = scorpio::get_attribute<int>(rhist_file,"GLOBAL","averaging_frequency");
-      EKAT_REQUIRE_MSG (old_freq == m_output_control.frequency,
-          "Error! Cannot change frequency when performing history restart.\n"
-          "  - old freq: " << old_freq << "\n"
-          "  - new freq: " << m_output_control.frequency << "\n");
-      auto old_freq_units = scorpio::get_attribute<std::string>(rhist_file,"GLOBAL","averaging_frequency_units");
-      EKAT_REQUIRE_MSG (old_freq_units == m_output_control.frequency_units,
-          "Error! Cannot change frequency units when performing history restart.\n"
-          "  - old freq units: " << old_freq_units << "\n"
-          "  - new freq units: " << m_output_control.frequency_units << "\n");
-      auto old_avg_type = scorpio::get_attribute<std::string>(rhist_file,"GLOBAL","averaging_type");
-      EKAT_REQUIRE_MSG (old_avg_type == e2str(m_avg_type),
-          "Error! Cannot change avg type when performing history restart.\n"
-          "  - old avg type: " << old_avg_type + "\n"
-          "  - new avg type: " << e2str(m_avg_type) << "\n");
-
+      // NOTE: we do not check that freq/freq_units/avg_type are not changed: since we used
+      //       that info to find the correct rhist file, we already know that they match!
       auto old_storage_type = scorpio::get_attribute<std::string>(rhist_file,"GLOBAL","file_max_storage_type");
       EKAT_REQUIRE_MSG (old_storage_type == e2str(m_output_file_specs.storage.type),
           "Error! Cannot change file storage type when performing history restart.\n"
@@ -400,7 +388,7 @@ void OutputManager::run(const util::TimeStamp& timestamp)
 
     // Check if we need to open a new file
     if (not filespecs.is_open) {
-      filespecs.filename = compute_filename (control,filespecs,timestamp);
+      filespecs.filename = compute_filename (filespecs,timestamp);
       // Register all dims/vars, write geometry data (e.g. lat/lon/hyam/hybm)
       setup_file(filespecs,control);
     }
@@ -613,18 +601,20 @@ long long OutputManager::res_dep_memory_footprint () const {
 }
 
 std::string OutputManager::
-compute_filename (const IOControl& control,
-                  const IOFileSpecs& file_specs,
+compute_filename (const IOFileSpecs& file_specs,
                   const util::TimeStamp& timestamp) const
 {
   auto filename = m_filename_prefix + file_specs.suffix();
+  const auto& control = m_output_control;
 
   // Always add avg type and frequency info
   filename += "." + e2str(m_avg_type);
   filename += "." + control.frequency_units+ "_x" + std::to_string(control.frequency);
 
-  // Optionally, add number of mpi ranks (useful mostly in unit tests, to run multiple MPI configs in parallel)
-  if (m_params.get<bool>("MPI Ranks in Filename")) {
+  // For standalone EAMxx, we may have 2+ versions of the same test running with two
+  // different choices of ranks. To avoid name clashing for the output files,
+  // add the comm size to the output file name.
+  if (is_scream_standalone()) {
     filename += ".np" + std::to_string(m_io_comm.size());
   }
 
@@ -679,7 +669,6 @@ set_params (const ekat::ParameterList& params,
     m_filename_prefix = m_params.get<std::string>("filename_prefix");
 
     // Hard code some parameters in case we access them later
-    m_params.set("MPI Ranks in Filename",false);
     m_params.set<std::string>("Floating Point Precision","real");
   } else {
     auto avg_type = m_params.get<std::string>("Averaging Type");
@@ -715,12 +704,6 @@ set_params (const ekat::ParameterList& params,
         "Error! Invalid/unsupported value for 'Floating Point Precision'.\n"
         "  - input value: " + prec + "\n"
         "  - supported values: float, single, double, real\n");
-
-    // If not set, hard code to false for CIME cases, and true for standalone,
-    // since standalone may be running multiple versions of the same test at once
-    if (not m_params.isParameter("MPI Ranks in Filename")) {
-      m_params.set("MPI Ranks in Filename",is_scream_standalone());
-    }
   }
 
   // Output control
diff --git a/components/eamxx/src/share/io/scream_output_manager.hpp b/components/eamxx/src/share/io/scream_output_manager.hpp
index d25dd037c67..4d7486380cf 100644
--- a/components/eamxx/src/share/io/scream_output_manager.hpp
+++ b/components/eamxx/src/share/io/scream_output_manager.hpp
@@ -120,8 +120,7 @@ class OutputManager
   long long res_dep_memory_footprint () const;
 protected:
 
-  std::string compute_filename (const IOControl& control,
-                                const IOFileSpecs& file_specs,
+  std::string compute_filename (const IOFileSpecs& file_specs,
                                 const util::TimeStamp& timestamp) const;
 
   void set_file_header(const IOFileSpecs& file_specs);
diff --git a/components/eamxx/src/share/io/tests/io_utils.cpp b/components/eamxx/src/share/io/tests/io_utils.cpp
index 77779307a72..cf7b66ad859 100644
--- a/components/eamxx/src/share/io/tests/io_utils.cpp
+++ b/components/eamxx/src/share/io/tests/io_utils.cpp
@@ -9,6 +9,9 @@
 TEST_CASE ("find_filename_in_rpointer") {
   using namespace scream;
 
+  constexpr auto AVG = OutputAvgType::Average;
+  constexpr auto INST = OutputAvgType::Instant;
+
   ekat::Comm comm(MPI_COMM_WORLD);
 
   util::TimeStamp t0({2023,9,7},{12,0,0});
@@ -17,21 +20,35 @@ TEST_CASE ("find_filename_in_rpointer") {
   // Create a dummy rpointer
   std::ofstream rpointer ("rpointer.atm");
 
-  rpointer << "foo.r." + t0.to_string() + ".nc\n";
-  rpointer << "bar2.rhist." + t0.to_string() + ".nc\n";
-  rpointer << "bar.rhist." + t0.to_string() + ".nc\n";
-  rpointer.close();
+  IOControl foo_c, bar_c, bar2_c;
+  foo_c.frequency  = 3; foo_c.frequency_units  = "nsteps";
+  bar_c.frequency  = 1; bar_c.frequency_units  = "ndays";
+  bar2_c.frequency = 6; bar2_c.frequency_units = "nhours";
 
-  // Now test find_filename_in_rpointer with different inputs
+  std::string suffix = ".np" + std::to_string(comm.size()) + "." + t0.to_string() + ".nc";
+  std::string foo_fname  = "foo.r.INSTANT.nsteps_x3"     + suffix;
+  std::string bar_fname  = "bar.rhist.AVERAGE.ndays_x1"  + suffix;
+  std::string bar2_fname = "bar.rhist.AVERAGE.nhours_x6" + suffix;
 
-  REQUIRE_THROWS (find_filename_in_rpointer("baz",false,comm,t0)); // wrong prefix
-  REQUIRE_THROWS (find_filename_in_rpointer("bar",false,comm,t1)); // wrong timestamp
-  REQUIRE_THROWS (find_filename_in_rpointer("bar",true, comm,t0)); // bar is not model restart
-  REQUIRE_THROWS (find_filename_in_rpointer("foo",false,comm,t0)); // foo is model restart
+  rpointer << foo_fname<< "\n";
+  rpointer << bar_fname<< "\n";
+  rpointer << bar2_fname << "\n";
+  rpointer.close();
 
-  REQUIRE (find_filename_in_rpointer("bar", false,comm,t0)==("bar.rhist."+t0.to_string()+".nc"));
-  REQUIRE (find_filename_in_rpointer("bar2",false,comm,t0)==("bar2.rhist."+t0.to_string()+".nc"));
-  REQUIRE (find_filename_in_rpointer("foo", true, comm,t0)==("foo.r."+t0.to_string()+".nc"));
+  // Now test find_filename_in_rpointer with different inputs
+  REQUIRE_THROWS (find_filename_in_rpointer("baz",false,comm,t0,AVG)); // missing control (needed for rhist files)
+  REQUIRE_THROWS (find_filename_in_rpointer("baz",false,comm,t0,AVG,bar_c)); // wrong prefix
+  REQUIRE_THROWS (find_filename_in_rpointer("bar",false,comm,t1,AVG,bar_c)); // wrong timestamp
+  REQUIRE_THROWS (find_filename_in_rpointer("bar",true, comm,t0,AVG,bar_c)); // bar is not model restart
+  REQUIRE_THROWS (find_filename_in_rpointer("bar",false,comm,t0,INST,bar_c)); // wrong avg type
+  REQUIRE_THROWS (find_filename_in_rpointer("bar",false,comm,t0,INST,bar2_c)); // wrong freq specs
+  REQUIRE_THROWS (find_filename_in_rpointer("foo",false,comm,t0,INST,foo_c)); // foo is model restart
+  REQUIRE_THROWS (find_filename_in_rpointer("foo",true,comm,t0,AVG)); // model restart MUST be INSTANT
+
+  auto test = find_filename_in_rpointer("bar",false,comm,t0,AVG,bar_c);
+  REQUIRE (find_filename_in_rpointer("bar",false,comm,t0,AVG,bar_c)==bar_fname);
+  REQUIRE (find_filename_in_rpointer("bar",false,comm,t0,AVG,bar2_c)==bar2_fname);
+  REQUIRE (find_filename_in_rpointer("foo",true, comm,t0)==foo_fname);
 }
 
 TEST_CASE ("io_control") {
diff --git a/components/eamxx/tests/multi-process/dynamics_physics/mam/homme_shoc_cld_mam_aci_p3_mam_optics_rrtmgp_mam_drydep/output.yaml b/components/eamxx/tests/multi-process/dynamics_physics/mam/homme_shoc_cld_mam_aci_p3_mam_optics_rrtmgp_mam_drydep/output.yaml
index f2408ab189a..5922c718e6e 100644
--- a/components/eamxx/tests/multi-process/dynamics_physics/mam/homme_shoc_cld_mam_aci_p3_mam_optics_rrtmgp_mam_drydep/output.yaml
+++ b/components/eamxx/tests/multi-process/dynamics_physics/mam/homme_shoc_cld_mam_aci_p3_mam_optics_rrtmgp_mam_drydep/output.yaml
@@ -120,5 +120,4 @@ Fields:
 output_control:
   Frequency: ${NUM_STEPS}
   frequency_units: nsteps
-  MPI Ranks in Filename: true
 ...
diff --git a/components/eamxx/tests/multi-process/dynamics_physics/mam/homme_shoc_cld_p3_mam_optics_rrtmgp/output.yaml b/components/eamxx/tests/multi-process/dynamics_physics/mam/homme_shoc_cld_p3_mam_optics_rrtmgp/output.yaml
index 559f5158bb6..be4bb16b95d 100644
--- a/components/eamxx/tests/multi-process/dynamics_physics/mam/homme_shoc_cld_p3_mam_optics_rrtmgp/output.yaml
+++ b/components/eamxx/tests/multi-process/dynamics_physics/mam/homme_shoc_cld_p3_mam_optics_rrtmgp/output.yaml
@@ -117,5 +117,4 @@ Fields:
 output_control:
   Frequency: ${NUM_STEPS}
   frequency_units: nsteps
-  MPI Ranks in Filename: true
 ...
diff --git a/components/eamxx/tests/multi-process/physics_only/mam/optics_rrtmgp/output.yaml b/components/eamxx/tests/multi-process/physics_only/mam/optics_rrtmgp/output.yaml
index 24e1dfbb3e7..bdda48ebe45 100644
--- a/components/eamxx/tests/multi-process/physics_only/mam/optics_rrtmgp/output.yaml
+++ b/components/eamxx/tests/multi-process/physics_only/mam/optics_rrtmgp/output.yaml
@@ -26,5 +26,4 @@ Field Names:
 output_control:
   Frequency: ${NUM_STEPS}
   frequency_units: nsteps
-  MPI Ranks in Filename: true
 ...
diff --git a/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/CMakeLists.txt b/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/CMakeLists.txt
index 973e58b7da5..62c4b6d2266 100644
--- a/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/CMakeLists.txt
+++ b/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/CMakeLists.txt
@@ -19,7 +19,6 @@ CreateUnitTest(create_vert_remap_and_weights "create_vert_remap_and_weights.cpp"
 # Run a test to setup nudging source data:
 set (NUM_STEPS  5)
 set (POSTFIX source_data)
-set (ADD_RANKS false)
 set (ATM_TIME_STEP 300)
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/input_source_data.yaml
                ${CMAKE_CURRENT_BINARY_DIR}/input_source_data.yaml)
@@ -36,7 +35,6 @@ CreateUnitTestFromExec (shoc_p3_source shoc_p3_nudging
 set (NUM_STEPS  5)
 set (ATM_TIME_STEP 300)
 set (POSTFIX nudged)
-set (ADD_RANKS true)
 set (VERT_TYPE TIME_DEPENDENT_3D_PROFILE)
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/input_nudging.yaml
                ${CMAKE_CURRENT_BINARY_DIR}/input_nudging.yaml)
diff --git a/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/input_nudging.yaml b/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/input_nudging.yaml
index 2b33d15f9f7..6a4c0003376 100644
--- a/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/input_nudging.yaml
+++ b/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/input_nudging.yaml
@@ -14,7 +14,7 @@ atmosphere_processes:
   p3:
     max_total_ni: 720.0e3
   nudging:
-    nudging_filenames_patterns: [shoc_p3_source_data_${POSTFIX}.INSTANT.nsteps_x${NUM_STEPS}.${RUN_T0}.nc]
+    nudging_filenames_patterns: [shoc_p3_source_data_${POSTFIX}.INSTANT.nsteps_x${NUM_STEPS}.np1.${RUN_T0}.nc]
     nudging_fields: ["T_mid", "qv"]
     nudging_timescale: 1000
     use_nudging_weights: true
diff --git a/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/output.yaml b/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/output.yaml
index e740c5cdf1f..d9b573068ae 100644
--- a/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/output.yaml
+++ b/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/output.yaml
@@ -3,7 +3,6 @@
 filename_prefix: shoc_p3_${POSTFIX}_nudged
 Averaging Type: Instant
 Max Snapshots Per File: 2
-MPI Ranks in Filename: ${ADD_RANKS}
 Field Names:
   - p_mid
   - T_mid
diff --git a/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/output_remapped.yaml b/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/output_remapped.yaml
index c75a6a862f7..26f53fbe57f 100644
--- a/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/output_remapped.yaml
+++ b/components/eamxx/tests/multi-process/physics_only/shoc_p3_nudging/output_remapped.yaml
@@ -4,7 +4,6 @@ filename_prefix: shoc_p3_${POSTFIX}_nudged_remapped
 Averaging Type: Instant
 Max Snapshots Per File: 2
 vertical_remap_file: vertical_remap.nc
-MPI Ranks in Filename: ${ADD_RANKS}
 Field Names:
   - T_mid
   - qv
diff --git a/components/eamxx/tests/single-process/mam/optics/output.yaml b/components/eamxx/tests/single-process/mam/optics/output.yaml
index 8ea3d237933..d0c27e04284 100644
--- a/components/eamxx/tests/single-process/mam/optics/output.yaml
+++ b/components/eamxx/tests/single-process/mam/optics/output.yaml
@@ -13,5 +13,4 @@ Fields:
 output_control:
   Frequency: 2
   frequency_units: nsteps
-  MPI Ranks in Filename: true
 ...