diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c0bce623..95d9b1b2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,13 +54,13 @@ jobs:
       if: matrix.platform == 'ubuntu-latest'
       timeout-minutes: 10
       run: |
-        TLS_PROTOCOLS="tlsv1.2" TLS=1 ./tests/run_tests.sh
+        TLS_PROTOCOLS='TLSv1.2' TLS=1 ./tests/run_tests.sh
 
     - name: Test OSS TCP TLS v1.3
       if: matrix.platform == 'ubuntu-latest'
       timeout-minutes: 10
       run: |
-        TLS_PROTOCOLS="tlsv1.3" TLS=1 ./tests/run_tests.sh
+        TLS_PROTOCOLS='TLSv1.3' TLS=1 ./tests/run_tests.sh
 
     - name: Test OSS-CLUSTER TCP
       timeout-minutes: 10
diff --git a/memtier_benchmark.cpp b/memtier_benchmark.cpp
index 26e585cf..315af342 100755
--- a/memtier_benchmark.cpp
+++ b/memtier_benchmark.cpp
@@ -913,8 +913,8 @@ static int config_parse_args(int argc, char *argv[], struct benchmark_config *cf
                             return -1;
     #endif
                         } else {
-                            fprintf(stderr, "Invalid tls-protocols specified. "
-                                    "Use a combination of 'TLSv1', 'TLSv1.1', 'TLSv1.2' and 'TLSv1.3'.");
+                            fprintf(stderr, "Invalid tls-protocols specified %s."
+                                    "Use a combination of 'TLSv1', 'TLSv1.1', 'TLSv1.2' and 'TLSv1.3'.", tls_token);
                             return -1;
                             break;
                         }
diff --git a/tests/tests_oss_simple_flow.py b/tests/tests_oss_simple_flow.py
index f0743acd..6fb0c726 100644
--- a/tests/tests_oss_simple_flow.py
+++ b/tests/tests_oss_simple_flow.py
@@ -261,8 +261,10 @@ def test_default_set_get_3_runs(env):
 
 
 def test_default_arbitrary_command_pubsub(env):
-    benchmark_specs = {"name": env.testName, "args": ['--command=publish \"__key__\" \"__data__\"']}
+    benchmark_specs = {"name": env.testName, "args": []}
     addTLSArgs(benchmark_specs, env)
+    # on arbitrary command args should be the last one
+    benchmark_specs["args"].append('--command=publish \"__key__\" \"__data__\"')
     config = get_default_memtier_config()
     master_nodes_list = env.getMasterNodesList()
 
@@ -281,8 +283,10 @@ def test_default_arbitrary_command_pubsub(env):
 
 
 def test_default_arbitrary_command_keyless(env):
-    benchmark_specs = {"name": env.testName, "args": ['--command=PING']}
+    benchmark_specs = {"name": env.testName, "args": []}
     addTLSArgs(benchmark_specs, env)
+    # on arbitrary command args should be the last one
+    benchmark_specs["args"].append('--command=PING')
     config = get_default_memtier_config()
     master_nodes_list = env.getMasterNodesList()
 
@@ -301,8 +305,10 @@ def test_default_arbitrary_command_keyless(env):
 
 
 def test_default_arbitrary_command_set(env):
-    benchmark_specs = {"name": env.testName, "args": ['--command=SET __key__ __data__']}
+    benchmark_specs = {"name": env.testName, "args": []}
     addTLSArgs(benchmark_specs, env)
+    # on arbitrary command args should be the last one
+    benchmark_specs["args"].append('--command=SET __key__ __data__')
     config = get_default_memtier_config()
     master_nodes_list = env.getMasterNodesList()
     overall_expected_request_count = get_expected_request_count(config)
@@ -327,8 +333,10 @@ def test_default_arbitrary_command_set(env):
 
 
 def test_default_arbitrary_command_hset(env):
-    benchmark_specs = {"name": env.testName, "args": ['--command=HSET __key__ field1 __data__']}
+    benchmark_specs = {"name": env.testName, "args": []}
     addTLSArgs(benchmark_specs, env)
+    # on arbitrary command args should be the last one
+    benchmark_specs["args"].append('--command=HSET __key__ field1 __data__')
     config = get_default_memtier_config()
     master_nodes_list = env.getMasterNodesList()
     overall_expected_request_count = get_expected_request_count(config)
@@ -353,9 +361,11 @@ def test_default_arbitrary_command_hset(env):
 
 
 def test_default_arbitrary_command_hset_multi_data_placeholders(env):
-    benchmark_specs = {"name": env.testName, "args": ['--command=HSET __key__ field1 __data__ field2 __data__ field3 __data__']}
+    benchmark_specs = {"name": env.testName, "args": []}
     addTLSArgs(benchmark_specs, env)
-    config = get_default_memtier_config()
+    # on arbitrary command args should be the last one
+    benchmark_specs["args"].append('--command=HSET __key__ field1 __data__ field2 __data__ field3 __data__')
+    memtier_config = get_default_memtier_config()
     master_nodes_list = env.getMasterNodesList()
     overall_expected_request_count = get_expected_request_count(config)