diff --git a/cross/arm32_ci_script.sh b/cross/arm32_ci_script.sh
index 991842aa8929..66a2cc5dd5bc 100755
--- a/cross/arm32_ci_script.sh
+++ b/cross/arm32_ci_script.sh
@@ -208,10 +208,10 @@ function cross_build_corefx_with_docker {
         # For armel Tizen, we are going to construct RootFS on the fly.
         case $__linuxCodeName in
         tizen)
-            __dockerImage=" hqueue/dotnetcore:ubuntu1404_cross_prereqs_v4-tizen_rootfs"
+            __dockerImage=" tizendotnet/dotnet-buildtools-prereqs:ubuntu-16.04-cross-e435274-20180426002255-tizen-rootfs-5.0m1"
             __skipRootFS=1
             __dockerEnvironmentVariables+=" -e ROOTFS_DIR=/crossrootfs/armel.tizen.build"
-            __runtimeOS="tizen.4.0.0"
+            __runtimeOS="tizen.5.0.0"
         ;;
         *)
             echo "ERROR: $__linuxCodeName is not a supported linux name for $__buildArch"
diff --git a/cross/armel/tizen-fetch.sh b/cross/armel/tizen-fetch.sh
index c7a509a7508c..6f039c6d90f3 100755
--- a/cross/armel/tizen-fetch.sh
+++ b/cross/armel/tizen-fetch.sh
@@ -51,7 +51,7 @@ if [ ! -d $TMPDIR ]; then
 	mkdir -p $TMPDIR 
 fi
 
-TIZEN_URL=http://download.tizen.org/releases/daily/tizen
+TIZEN_URL=http://download.tizen.org/releases/milestone/tizen
 BUILD_XML=build.xml
 REPOMD_XML=repomd.xml
 PRIMARY_XML=primary.xml
@@ -157,20 +157,15 @@ fetch_tizen_pkgs()
 Inform "Initialize base"
 fetch_tizen_pkgs_init standard base
 Inform "fetch common packages"
-fetch_tizen_pkgs armv7l gcc glibc glibc-devel
+fetch_tizen_pkgs armv7l gcc glibc glibc-devel libicu-devel
 fetch_tizen_pkgs noarch linux-glibc-devel
 Inform "fetch coreclr packages"
-fetch_tizen_pkgs armv7l lldb lldb-devel libuuid libuuid-devel libgcc libstdc++ libstdc++-devel libunwind libunwind-devel
+fetch_tizen_pkgs armv7l lldb lldb-devel libuuid libuuid-devel libgcc libstdc++ libstdc++-devel libunwind libunwind-devel tizen-release
 Inform "fetch corefx packages"
-fetch_tizen_pkgs armv7l libcom_err libcom_err-devel zlib zlib-devel libopenssl libopenssl-devel
+fetch_tizen_pkgs armv7l libcom_err libcom_err-devel zlib zlib-devel libopenssl libopenssl-devel krb5 krb5-devel libcurl libcurl-devel
 
 Inform "Initialize unified"
 fetch_tizen_pkgs_init standard unified
-Inform "fetch common packages"
-fetch_tizen_pkgs armv7l libicu-devel
-Inform "fetch coreclr packages"
-fetch_tizen_pkgs armv7l tizen-release
 Inform "fetch corefx packages"
-fetch_tizen_pkgs armv7l gssdp gssdp-devel krb5 krb5-devel libcurl libcurl-devel
-
+fetch_tizen_pkgs armv7l gssdp gssdp-devel
 
diff --git a/netci.groovy b/netci.groovy
index d07ef1b78d7a..c741fcf3d4b3 100644
--- a/netci.groovy
+++ b/netci.groovy
@@ -326,29 +326,20 @@ def targetGroupOsMapInnerloop = ['netcoreapp': ['Windows_NT', 'Ubuntu14.04', 'Ub
                     }
                 }
 
-                // Disable Tizen except when explicitly requested. See corefx/issues/28901
-                if (osName == "Tizen") {
-                    if (isPR) {
-                        Utilities.addGithubPRTriggerForBranch(newJob, branch, "${osName} ${abi} ${configurationGroup} Build", "(?i).*test\\W+${osName}\\W+${abi}\\W+${configurationGroup}.*")
-                    }
-                }
-                else
-                {
-                    // Set up triggers
-                    if (isPR) {
-                        // We run Tizen Debug and Linux Release as default PR builds
-                        if ((osName == "Tizen" && configurationGroup == "Debug") || (osName == "Linux" && configurationGroup == "Release")) {
-                            Utilities.addGithubPRTriggerForBranch(newJob, branch, "${osName} ${abi} ${configurationGroup} Build")
-                        }
-                        else {
-                            Utilities.addGithubPRTriggerForBranch(newJob, branch, "${osName} ${abi} ${configurationGroup} Build", "(?i).*test\\W+${osName}\\W+${abi}\\W+${configurationGroup}.*")
-                        }
+                // Set up triggers
+                if (isPR) {
+                    // We run Tizen Debug and Linux Release as default PR builds
+                    if ((osName == "Tizen" && configurationGroup == "Debug") || (osName == "Linux" && configurationGroup == "Release")) {
+                        Utilities.addGithubPRTriggerForBranch(newJob, branch, "${osName} ${abi} ${configurationGroup} Build")
                     }
                     else {
-                        // Set a push trigger
-                        Utilities.addGithubPushTrigger(newJob)
+                        Utilities.addGithubPRTriggerForBranch(newJob, branch, "${osName} ${abi} ${configurationGroup} Build", "(?i).*test\\W+${osName}\\W+${abi}\\W+${configurationGroup}.*")
                     }
                 }
+                else {
+                    // Set a push trigger
+                    Utilities.addGithubPushTrigger(newJob)
+                }
             } // osName
         } // configurationGroup
     } // targetGroup