diff --git a/runtime/parsed_options.cc b/runtime/parsed_options.cc
index a44e5a4..0d98d90 100644
--- a/runtime/parsed_options.cc
+++ b/runtime/parsed_options.cc
@@ -518,9 +518,12 @@
     LOG(INFO) << "setting boot class path to " << *args.Get(M::BootClassPath);
   }
 
-  if (args.GetOrDefault(M::UseJitCompilation) && args.GetOrDefault(M::Interpret)) {
-    Usage("-Xusejit:true and -Xint cannot be specified together");
-    Exit(0);
+  if (args.GetOrDefault(M::Interpret)) {
+    if (args.Exists(M::UseJitCompilation) && *args.Get(M::UseJitCompilation)) {
+      Usage("-Xusejit:true and -Xint cannot be specified together\n");
+      Exit(0);
+    }
+    args.Set(M::UseJitCompilation, false);
   }
 
   // Set a default boot class path if we didn't get an explicit one via command line.
diff --git a/runtime/runtime_options.def b/runtime/runtime_options.def
index ef21f9f..5e12bbc 100644
--- a/runtime/runtime_options.def
+++ b/runtime/runtime_options.def
@@ -69,7 +69,7 @@
 RUNTIME_OPTIONS_KEY (Unit,                LowMemoryMode)
 RUNTIME_OPTIONS_KEY (bool,                UseTLAB,                        (kUseTlab || kUseReadBarrier))
 RUNTIME_OPTIONS_KEY (bool,                EnableHSpaceCompactForOOM,      true)
-RUNTIME_OPTIONS_KEY (bool,                UseJitCompilation,              false)
+RUNTIME_OPTIONS_KEY (bool,                UseJitCompilation,              true)
 RUNTIME_OPTIONS_KEY (bool,                DumpNativeStackOnSigQuit,       true)
 RUNTIME_OPTIONS_KEY (bool,                MadviseRandomAccess,            false)
 RUNTIME_OPTIONS_KEY (unsigned int,        JITCompileThreshold)
diff --git a/test/638-checker-inline-cache-intrinsic/run b/test/638-checker-inline-cache-intrinsic/run
index f43681d..1540310 100644
--- a/test/638-checker-inline-cache-intrinsic/run
+++ b/test/638-checker-inline-cache-intrinsic/run
@@ -14,4 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Set threshold to 100 to math the iterations done in the test.
+# Pass --verbose-methods to only generate the CFG of these methods.
 exec ${RUN} --jit --runtime-option -Xjitthreshold:100 -Xcompiler-option --verbose-methods=inlineMonomorphic,knownReceiverType,stringEquals $@
diff --git a/test/916-obsolete-jit/run b/test/916-obsolete-jit/run
index b6d406f..c6e62ae 100755
--- a/test/916-obsolete-jit/run
+++ b/test/916-obsolete-jit/run
@@ -14,12 +14,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# We are testing the redefinition of compiled code but with jvmti we only allow
-# jitted compiled code so always add the --jit argument.
-if [[ "$@" == *"--jit"* ]]; then
-  other_args=""
-else
-  other_args="--jit"
-fi
-./default-run "$@" ${other_args} \
-                   --jvmti
+./default-run "$@" --jvmti
diff --git a/test/etc/run-test-jar b/test/etc/run-test-jar
index 713fd35..5c4ad21 100755
--- a/test/etc/run-test-jar
+++ b/test/etc/run-test-jar
@@ -588,7 +588,7 @@
 fi
 
 if [ "$INTERPRETER" = "y" ]; then
-    INT_OPTS="-Xint"
+    INT_OPTS="${INT_OPTS} -Xint"
     if [ "$VERIFY" = "y" ] ; then
       INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=quicken"
       COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=quicken"
@@ -604,7 +604,7 @@
 fi
 
 if [ "$JIT" = "y" ]; then
-    INT_OPTS="-Xusejit:true"
+    INT_OPTS="${INT_OPTS} -Xusejit:true"
     if [ "$VERIFY" = "y" ] ; then
       INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=quicken"
       COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=quicken"
@@ -613,6 +613,8 @@
       COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=assume-verified"
       DEX_VERIFY="${DEX_VERIFY} -Xverify:none"
     fi
+else
+    INT_OPTS="${INT_OPTS} -Xusejit:false"
 fi
 
 JNI_OPTS="-Xjnigreflimit:512 -Xcheck:jni"
diff --git a/test/knownfailures.json b/test/knownfailures.json
index a280f85..f71e936 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -246,7 +246,7 @@
                   "613-inlining-dex-cache",
                   "626-set-resolved-string",
                   "638-checker-inline-cache-intrinsic"],
-        "variant": "trace  | stream",
+        "variant": "trace | stream",
         "description": ["These tests expect JIT compilation, which is",
                         "suppressed when tracing."]
     },
@@ -257,6 +257,11 @@
                         "suppressed when tracing."]
     },
     {
+        "tests": "638-checker-inline-cache-intrinsic",
+        "variant": "interpreter | interp-ac",
+        "description": ["Test expects JIT compilation"]
+    },
+    {
         "tests": "597-deopt-invoke-stub",
         "variant": "speed-profile | interp-ac | interpreter | optimizing | trace | stream",
         "description": ["This test expects JIT compilation and no AOT for",