diff --git a/unit-test-coverage/mcp750-vxworks/src/coveragetest-cfe-psp-start.c b/unit-test-coverage/mcp750-vxworks/src/coveragetest-cfe-psp-start.c
index 990aa105..7215153b 100644
--- a/unit-test-coverage/mcp750-vxworks/src/coveragetest-cfe-psp-start.c
+++ b/unit-test-coverage/mcp750-vxworks/src/coveragetest-cfe-psp-start.c
@@ -76,13 +76,13 @@ void Test_OS_Application_Startup(void)
     UtAssert_INT32_EQ(StartType.StartSubtype, CFE_PSP_RST_SUBTYPE_UNDEFINED_RESET);
 
     /* failure of OS_API_Init */
-    UT_SetForceFail(UT_KEY(OS_API_Init), OS_ERROR);
+    UT_SetDefaultReturnValue(UT_KEY(OS_API_Init), OS_ERROR);
     UT_OS_Application_Startup();
     UtAssert_INT32_EQ(UT_GetStubCount(UT_KEY(PCS_exit)), 1);
     UT_ClearForceFail(UT_KEY(OS_API_Init));
 
     /* failure of OS_FileSysAddFixedMap - an extra OS_printf */
-    UT_SetForceFail(UT_KEY(OS_FileSysAddFixedMap), OS_ERROR);
+    UT_SetDefaultReturnValue(UT_KEY(OS_FileSysAddFixedMap), OS_ERROR);
     UT_OS_Application_Startup();
     UtAssert_INT32_EQ(UT_GetStubCount(UT_KEY(OS_printf)), 9);
     UtAssert_INT32_EQ(UT_GetStubCount(UT_KEY(PCS_SystemMain)), 2);
diff --git a/unit-test-coverage/shared/src/coveragetest-cfe-psp-exceptionstorage.c b/unit-test-coverage/shared/src/coveragetest-cfe-psp-exceptionstorage.c
index 464caef6..7cad3ae1 100644
--- a/unit-test-coverage/shared/src/coveragetest-cfe-psp-exceptionstorage.c
+++ b/unit-test-coverage/shared/src/coveragetest-cfe-psp-exceptionstorage.c
@@ -111,7 +111,7 @@ void Test_CFE_PSP_Exception_GetSummary(void)
     /* Get an entry with failure to obtain task ID */
     UtAssert_NOT_NULL(CFE_PSP_Exception_GetNextContextBuffer());
     CFE_PSP_Exception_WriteComplete();
-    UT_SetForceFail(UT_KEY(OS_TaskFindIdBySystemData), OS_ERROR);
+    UT_SetDefaultReturnValue(UT_KEY(OS_TaskFindIdBySystemData), OS_ERROR);
     UtAssert_INT32_EQ(CFE_PSP_Exception_GetSummary(&LogId, &TaskId, ReasonBuf, sizeof(ReasonBuf)), CFE_PSP_SUCCESS);
     UT_ClearForceFail(UT_KEY(OS_TaskFindIdBySystemData));
     UtAssert_NONZERO(LogId);