diff --git a/modules/es/fsw/src/cfe_es_log.h b/modules/es/fsw/src/cfe_es_log.h
index 8ae358374..dbb4655b0 100644
--- a/modules/es/fsw/src/cfe_es_log.h
+++ b/modules/es/fsw/src/cfe_es_log.h
@@ -263,23 +263,6 @@ int32 CFE_ES_SysLogSetMode(CFE_ES_LogMode_Enum_t Mode);
  */
 void CFE_ES_SysLog_vsnprintf(char *Buffer, size_t BufferSize, const char *SpecStringPtr, va_list ArgPtr);
 
-/*---------------------------------------------------------------------------------------*/
-/**
- * \brief Format a message intended for output to the system log
- *
- * Identical to the CFE_ES_SysLog_vsnprintf() call but with a variable argument set,
- * for use in functions that need to directly handle a log message string.
- *
- * Similar in definition to the "snprintf()" C library call.
- *
- * \param Buffer        User supplied buffer to output formatted sting into
- * \param BufferSize    Size of "Buffer" parameter.  Should be greater than (CFE_TIME_PRINTED_STRING_SIZE+2)
- * \param SpecStringPtr Printf-style format string
- *
- * \sa CFE_ES_SysLogAppend_Unsync()
- */
-void CFE_ES_SysLog_snprintf(char *Buffer, size_t BufferSize, const char *SpecStringPtr, ...) OS_PRINTF(3, 4);
-
 /*---------------------------------------------------------------------------------------*/
 /**
  * \brief Write the contents of the syslog to a disk file
diff --git a/modules/es/fsw/src/cfe_es_syslog.c b/modules/es/fsw/src/cfe_es_syslog.c
index 1e639f05b..3f57561c5 100644
--- a/modules/es/fsw/src/cfe_es_syslog.c
+++ b/modules/es/fsw/src/cfe_es_syslog.c
@@ -442,23 +442,6 @@ void CFE_ES_SysLog_vsnprintf(char *Buffer, size_t BufferSize, const char *SpecSt
     }
 }
 
-/*----------------------------------------------------------------
- *
- * Function: CFE_ES_SysLog_snprintf
- *
- * Application-scope internal function
- * See description in header file for argument/return detail
- *
- *-----------------------------------------------------------------*/
-void CFE_ES_SysLog_snprintf(char *Buffer, size_t BufferSize, const char *SpecStringPtr, ...)
-{
-    va_list ArgPtr;
-
-    va_start(ArgPtr, SpecStringPtr);
-    CFE_ES_SysLog_vsnprintf(Buffer, BufferSize, SpecStringPtr, ArgPtr);
-    va_end(ArgPtr);
-}
-
 /*----------------------------------------------------------------
  *
  * Function: CFE_ES_SysLogDump
diff --git a/modules/es/ut-coverage/es_UT.c b/modules/es/ut-coverage/es_UT.c
index d2c757f02..d679240aa 100644
--- a/modules/es/ut-coverage/es_UT.c
+++ b/modules/es/ut-coverage/es_UT.c
@@ -696,7 +696,15 @@ void TestStartupErrorPaths(void)
     UtAssert_STUB_COUNT(CFE_PSP_Panic, 1);
     UtAssert_UINT32_EQ(PanicStatus, CFE_PSP_PANIC_STARTUP_SEM);
 
-    /* Perform ES main startup with a file open failure */
+    /* Perform ES main startup with a ES Perf Data mutex creation failure */
+    ES_ResetUnitTest();
+    UT_SetDeferredRetcode(UT_KEY(OS_MutSemCreate), 2, OS_ERROR);
+    UT_SetDataBuffer(UT_KEY(CFE_PSP_Panic), &PanicStatus, sizeof(PanicStatus), false);
+    CFE_ES_Main(CFE_PSP_RST_TYPE_POWERON, 1, 1, "ut_startup");
+    UtAssert_UINT32_EQ(PanicStatus, CFE_PSP_PANIC_STARTUP_SEM);
+    UtAssert_UINT32_EQ(UT_GetStubCount(UT_KEY(CFE_PSP_Panic)), 1);
+
+    /* Perform ES main startup with a ES Shared Data mutex creation failure */
     ES_ResetUnitTest();
     UT_SetDummyFuncRtn(OS_SUCCESS);
     UT_SetDefaultReturnValue(UT_KEY(OS_OpenCreate), OS_ERROR);
@@ -926,6 +934,13 @@ void TestStartupErrorPaths(void)
     CFE_UtAssert_PRINTF(UT_OSP_MESSAGES[UT_OSP_NO_FREE_CORE_APP_SLOTS]);
     CFE_UtAssert_PRINTF(UT_OSP_MESSAGES[UT_OSP_FUNCTION_POINTER]);
 
+    /* Test reading the object table with unknown object type */
+    ES_ResetUnitTest();
+    UT_SetDefaultReturnValue(UT_KEY(CFE_ResourceId_FindNext), OS_ERROR);
+    CFE_ES_ObjectTable[CFE_PLATFORM_ES_OBJECT_TABLE_SIZE - 1].ObjectType = -1;
+    CFE_ES_CreateObjects();
+    CFE_UtAssert_PRINTF(UT_OSP_MESSAGES[UT_OSP_NO_FREE_CORE_APP_SLOTS]);
+
     /* Test response to an invalid startup type */
     ES_ResetUnitTest();
     CFE_ES_Global.DebugVars.DebugFlag = 1;
@@ -4829,6 +4844,18 @@ void TestSysLog(void)
     CFE_UtAssert_MEMOFFSET_EQ(SysLogBuffer.BlockSize, 1);
     UtAssert_ZERO(SysLogBuffer.SizeLeft);
 
+    /* Test case where calculated blocksize results in 0 */
+    ES_ResetUnitTest();
+    SysLogBuffer.EndIdx   = 0;
+    SysLogBuffer.SizeLeft = 1;
+
+    CFE_ES_SysLogReadData(&SysLogBuffer);
+
+    UtAssert_UINT32_EQ(SysLogBuffer.EndIdx, 0);
+    CFE_UtAssert_MEMOFFSET_EQ(SysLogBuffer.LastOffset, 0);
+    CFE_UtAssert_MEMOFFSET_EQ(SysLogBuffer.BlockSize, 0);
+    UtAssert_INT32_EQ(SysLogBuffer.SizeLeft, 1);
+
     /* Test nominal flow through CFE_ES_SysLogDump
      * with multiple reads and writes  */
     ES_ResetUnitTest();