diff --git a/HeterogeneousCore/SonicTriton/interface/TritonService.h b/HeterogeneousCore/SonicTriton/interface/TritonService.h
index 255d1855f86c7..ea441088d2d4a 100644
--- a/HeterogeneousCore/SonicTriton/interface/TritonService.h
+++ b/HeterogeneousCore/SonicTriton/interface/TritonService.h
@@ -2,6 +2,7 @@
 #define HeterogeneousCore_SonicTriton_TritonService
 
 #include "FWCore/ParameterSet/interface/ParameterSet.h"
+#include "FWCore/Utilities/interface/GlobalIdentifier.h"
 
 #include <vector>
 #include <unordered_set>
@@ -38,7 +39,13 @@ class TritonService {
           instanceName(pset.getUntrackedParameter<std::string>("instanceName")),
           tempDir(pset.getUntrackedParameter<std::string>("tempDir")),
           imageName(pset.getUntrackedParameter<std::string>("imageName")),
-          sandboxName(pset.getUntrackedParameter<std::string>("sandboxName")) {}
+          sandboxName(pset.getUntrackedParameter<std::string>("sandboxName")) {
+      //randomize instance name
+      if (instanceName.empty()) {
+        instanceName =
+            pset.getUntrackedParameter<std::string>("instanceBaseName") + "_" + edm::createGlobalIdentifier();
+      }
+    }
 
     bool enable;
     bool debug;
diff --git a/HeterogeneousCore/SonicTriton/src/TritonService.cc b/HeterogeneousCore/SonicTriton/src/TritonService.cc
index 82ee6fa2d9658..f6b8f1914dc3a 100644
--- a/HeterogeneousCore/SonicTriton/src/TritonService.cc
+++ b/HeterogeneousCore/SonicTriton/src/TritonService.cc
@@ -8,7 +8,6 @@
 #include "FWCore/ServiceRegistry/interface/ActivityRegistry.h"
 #include "FWCore/ServiceRegistry/interface/ProcessContext.h"
 #include "FWCore/Utilities/interface/Exception.h"
-#include "FWCore/Utilities/interface/GlobalIdentifier.h"
 
 #include "grpc_client.h"
 #include "grpc_service.pb.h"
@@ -217,11 +216,6 @@ void TritonService::preBeginJob(edm::PathsAndConsumesOfModulesBase const&, edm::
   if (verbose_)
     edm::LogInfo("TritonService") << msg;
 
-  //randomize instance name
-  if (fallbackOpts_.instanceName.empty()) {
-    fallbackOpts_.instanceName = "triton_server_instance_" + edm::createGlobalIdentifier();
-  }
-
   //assemble server start command
   std::string command("cmsTriton -P -1 -p " + pid_);
   if (fallbackOpts_.debug)
@@ -308,6 +302,7 @@ void TritonService::fillDescriptions(edm::ConfigurationDescriptions& description
   fallbackDesc.addUntracked<bool>("useGPU", false);
   fallbackDesc.addUntracked<int>("retries", -1);
   fallbackDesc.addUntracked<int>("wait", -1);
+  fallbackDesc.addUntracked<std::string>("instanceBaseName", "triton_server_instance");
   fallbackDesc.addUntracked<std::string>("instanceName", "");
   fallbackDesc.addUntracked<std::string>("tempDir", "");
   fallbackDesc.addUntracked<std::string>("imageName", "");
diff --git a/HeterogeneousCore/SonicTriton/test/tritonTest_cfg.py b/HeterogeneousCore/SonicTriton/test/tritonTest_cfg.py
index d9ba2be799cc5..fafb6346eaaaf 100644
--- a/HeterogeneousCore/SonicTriton/test/tritonTest_cfg.py
+++ b/HeterogeneousCore/SonicTriton/test/tritonTest_cfg.py
@@ -29,6 +29,7 @@
 options.register("mode","Async", VarParsing.multiplicity.singleton, VarParsing.varType.string, "mode for client (choices: {})".format(', '.join(allowed_modes)))
 options.register("verbose", False, VarParsing.multiplicity.singleton, VarParsing.varType.bool, "enable verbose output")
 options.register("brief", False, VarParsing.multiplicity.singleton, VarParsing.varType.bool, "briefer output for graph modules")
+options.register("fallbackName", "", VarParsing.multiplicity.singleton, VarParsing.varType.string, "name for fallback server")
 options.register("unittest", False, VarParsing.multiplicity.singleton, VarParsing.varType.bool, "unit test mode: reduce input sizes")
 options.register("testother", False, VarParsing.multiplicity.singleton, VarParsing.varType.bool, "also test gRPC communication if shared memory enabled, or vice versa")
 options.register("shm", True, VarParsing.multiplicity.singleton, VarParsing.varType.bool, "enable shared memory")
@@ -83,6 +84,8 @@
 process.TritonService.verbose = options.verbose
 process.TritonService.fallback.verbose = options.verbose
 process.TritonService.fallback.useDocker = options.docker
+if len(options.fallbackName)>0:
+    process.TritonService.fallback.instanceBaseName = options.fallbackName
 if options.device != "auto":
     process.TritonService.fallback.useGPU = options.device=="gpu"
 if len(options.address)>0:
diff --git a/HeterogeneousCore/SonicTriton/test/unittest.sh b/HeterogeneousCore/SonicTriton/test/unittest.sh
index 38989cc598e42..410a34991e4f1 100755
--- a/HeterogeneousCore/SonicTriton/test/unittest.sh
+++ b/HeterogeneousCore/SonicTriton/test/unittest.sh
@@ -58,14 +58,16 @@ if [ -n "$SINGULARITY_CONTAINER" ]; then
 	fi
 fi
 
+fallbackName=triton_server_instance_${DEVICE}
 tmpFile=$(mktemp -p ${LOCALTOP} SonicTritonTestXXXXXXXX.log)
-cmsRun ${LOCALTOP}/src/HeterogeneousCore/SonicTriton/test/tritonTest_cfg.py modules=TritonGraphProducer,TritonGraphFilter,TritonGraphAnalyzer maxEvents=2 unittest=1 verbose=1 device=${DEVICE} testother=1 >& $tmpFile
+cmsRun ${LOCALTOP}/src/HeterogeneousCore/SonicTriton/test/tritonTest_cfg.py modules=TritonGraphProducer,TritonGraphFilter,TritonGraphAnalyzer maxEvents=2 unittest=1 verbose=1 device=${DEVICE} testother=1 fallbackName=${fallbackName} >& $tmpFile
 CMSEXIT=$?
 
 cat $tmpFile
+sleep 15
 
 STOP_COUNTER=0
-while ! LOGFILE="$(ls -rt ${LOCALTOP}/log_triton_server_instance*.log 2>/dev/null | tail -n 1)" && [ "$STOP_COUNTER" -lt 5 ]; do
+while ! LOGFILE="$(ls -rt ${LOCALTOP}/log_${fallbackName}_*.log 2>/dev/null | tail -n 1)" && [ "$STOP_COUNTER" -lt 5 ]; do
 	STOP_COUNTER=$((STOP_COUNTER+1))
 	sleep 5
 done
@@ -73,6 +75,7 @@ done
 if [ -n "$LOGFILE" ]; then
 	echo -e '\n=====\nContents of '$LOGFILE':\n=====\n'
 	cat "$LOGFILE"
+	rm $LOGFILE
 fi
 
 if grep -q "Socket closed" $tmpFile; then