diff --git a/testCa/Makefile b/testCa/Makefile
index da17a17..90ab926 100644
--- a/testCa/Makefile
+++ b/testCa/Makefile
@@ -12,7 +12,7 @@ TESTPROD_HOST += testCaProvider
 testCaProvider_SRCS  += testCaProvider.cpp
 caTestHarness_SRCS += testCaProvider.cpp
 TESTS += testCaProvider
-ifdef BASE_3_15
+ifdef BASE_3_16
   testCaProvider_SRCS  += testIoc_registerRecordDeviceDriver.cpp
   REGRDDFLAGS = -l
 else
@@ -20,8 +20,8 @@ else
   export EPICS_HOST_ARCH
 endif
 
-ifdef BASE_3_15
-  # Embedded OSes need dbUnitTest, Base-3.15 and higher only
+ifdef BASE_3_16
+  # Embedded OSes need Base-3.16.2 or higher to pass tests
 
   # The test collection is caTestHarness
   caTestHarness_SRCS += pvCaAllTests.c
@@ -41,7 +41,7 @@ TESTSCRIPTS_HOST += $(TESTS:%=%.t)
 
 include $(TOP)/configure/RULES
 
-ifdef BASE_3_15
+ifdef BASE_3_16
   $(COMMON_DIR)/testIoc.dbd: $(EPICS_BASE)/dbd/softIoc.dbd
 	$(CP) $< $@
 endif
diff --git a/testCa/testCaProvider.cpp b/testCa/testCaProvider.cpp
index 8b5f439..9b3c1e2 100644
--- a/testCa/testCaProvider.cpp
+++ b/testCa/testCaProvider.cpp
@@ -16,7 +16,7 @@
 #include <epicsVersion.h>
 
 #ifdef EPICS_VERSION_INT
-  #if EPICS_VERSION_INT >= VERSION_INT(3,15,0,1)
+  #if EPICS_VERSION_INT >= VERSION_INT(3,16,2,0)
     #define USE_DBUNITTEST
     // USE_TYPED_RSET prevents deprecation warnings
     #define USE_TYPED_RSET
@@ -704,8 +704,9 @@ void TestIoc::start()
 void TestIoc::run()
 {
 #ifndef USE_DBUNITTEST
-    // Base-3.14 doesn't provide the dbUnitTest APIs.
-    // This code only works on workstation targets, it runs the
+    // Base-3.14 doesn't provide the dbUnitTest APIs, and the CA
+    // tests with an embedded IOC fail with a Base before 3.16.2.
+    // This version only works on workstation targets, it runs the
     // softIoc from Base as a separate process, using system().
     char * base;
     base = getenv("EPICS_BASE");