diff --git a/.github/workflows/shell.yml b/.github/workflows/shell.yml
index 5b3576a..eb1a63a 100644
--- a/.github/workflows/shell.yml
+++ b/.github/workflows/shell.yml
@@ -49,21 +49,21 @@ jobs:
         git config user.email "you@example.com"
         git config user.name "Your Name"
 
-    - name: Test help flags
+    - name: Zero exit code when use help flags
       working-directory: tornado
       run: |
         ../go-mod-bump.sh -h
         ../go-mod-bump.sh -help
 
-    - name: Default exit code must be zero
+    - name: Zero exit code when module name is not set
       working-directory: tornado
       run: |
         ../go-mod-bump.sh
 
-    - name: Test bump '${{ matrix.pkg }}'
+    - name: Update dependencies when there is something to update
       working-directory: tornado
       run: |
-        git checkout --quiet 029fe5d254ab71c1e72444adcda808f5a494084d
+        git checkout --force --quiet 029fe5d254ab71c1e72444adcda808f5a494084d
         ../go-mod-bump.sh ${{ matrix.pkg }}
         commit_count=$(git rev-list --count HEAD ^029fe5d254ab71c1e72444adcda808f5a494084d)
         if [[ "$commit_count" == 0 ]]; then
@@ -71,3 +71,17 @@ jobs:
           exit 1
         fi
         git diff 029fe5d254ab71c1e72444adcda808f5a494084d
+
+    - name: Zero exit code when nothing to update
+      working-directory: tornado
+      run: |
+        git checkout --force --quiet 029fe5d254ab71c1e72444adcda808f5a494084d
+        ../go-mod-bump.sh ${{ matrix.pkg }}   # update
+        ../go-mod-bump.sh ${{ matrix.pkg }}   # nothing to update
+
+    - name: Zero exit code when no have direct modules
+      run: |
+        mkdir testo
+        cd testo
+        go mod init testo
+        ../go-mod-bump.sh all
diff --git a/go-mod-bump.sh b/go-mod-bump.sh
index a8aee8e..4b5c441 100755
--- a/go-mod-bump.sh
+++ b/go-mod-bump.sh
@@ -91,18 +91,32 @@ fi
 GO_LIST_FORMAT_DIRECT='{{.Path}}{{if .Indirect}}<SKIP>{{end}}{{if .Main}}<SKIP>{{end}}'
 readonly GO_LIST_FORMAT_DIRECT
 
+echoerr "go-mod-bump: fetching direct modules"
+
 # shellcheck disable=SC2068
-DIRECT_MODULES=$(go list -m -f "$GO_LIST_FORMAT_DIRECT" $@ | grep -v '<SKIP>')
+DIRECT_MODULES=$(go list -m -f "$GO_LIST_FORMAT_DIRECT" $@ | grep -v '<SKIP>' || true)
 readonly DIRECT_MODULES
 
+if [ -z "$DIRECT_MODULES" ]; then
+    echoerr "go-mod-bump: nothing to update (no direct modules found)"
+    exit 0
+fi
+
 GO_LIST_FORMAT_FOR_UPDATE='{{.Path}}@{{.Version}}@{{if .Update}}{{.Update.Version}}{{end}}'
 GO_LIST_FORMAT_FOR_UPDATE+='{{if not .Update}}<SKIP>{{end}}' # skip modules without updates.
 readonly GO_LIST_FORMAT_FOR_UPDATE
 
+echoerr "go-mod-bump: fetching latest versions of modules"
+
 # shellcheck disable=SC2086
-MODULES_FOR_UPDATE=$(go list -m -u -f "$GO_LIST_FORMAT_FOR_UPDATE" $DIRECT_MODULES | grep -v '<SKIP>')
+MODULES_FOR_UPDATE=$(go list -m -u -f "$GO_LIST_FORMAT_FOR_UPDATE" $DIRECT_MODULES | grep -v '<SKIP>' || true)
 readonly MODULES_FOR_UPDATE
 
+if [ -z "$MODULES_FOR_UPDATE" ]; then
+    echoerr "go-mod-bump: nothing to update (no new versions found)"
+    exit 0
+fi
+
 function update_module() {
     go get "$1"