diff --git a/client/driver/args/args.go b/client/driver/args/args.go
index e40be3f29..9e8a9980c 100644
--- a/client/driver/args/args.go
+++ b/client/driver/args/args.go
@@ -9,13 +9,13 @@ var (
 // ParseAndReplace takes the user supplied args and a map of environment
 // variables. It replaces any instance of an environment variable in the args
 // with the actual value.
-func ParseAndReplace(args []string, env map[string]string) ([]string, error) {
+func ParseAndReplace(args []string, env map[string]string) []string {
 	replaced := make([]string, len(args))
 	for i, arg := range args {
 		replaced[i] = ReplaceEnv(arg, env)
 	}
 
-	return replaced, nil
+	return replaced
 }
 
 // ReplaceEnv takes an arg and replaces all occurences of environment variables.
diff --git a/client/driver/args/args_test.go b/client/driver/args/args_test.go
index e11b2cc8b..5e7cbca4a 100644
--- a/client/driver/args/args_test.go
+++ b/client/driver/args/args_test.go
@@ -23,10 +23,7 @@ var (
 func TestDriverArgs_ParseAndReplaceInvalidEnv(t *testing.T) {
 	input := []string{"invalid", "$FOO"}
 	exp := []string{"invalid", "$FOO"}
-	act, err := ParseAndReplace(input, envVars)
-	if err != nil {
-		t.Fatalf("Failed to parse valid input args %v: %v", input, err)
-	}
+	act := ParseAndReplace(input, envVars)
 
 	if !reflect.DeepEqual(act, exp) {
 		t.Fatalf("ParseAndReplace(%v, %v) returned %#v; want %#v", input, envVars, act, exp)
@@ -36,10 +33,7 @@ func TestDriverArgs_ParseAndReplaceInvalidEnv(t *testing.T) {
 func TestDriverArgs_ParseAndReplaceValidEnv(t *testing.T) {
 	input := []string{"nomad_ip", fmt.Sprintf(`"$%v"!`, ipKey)}
 	exp := []string{"nomad_ip", fmt.Sprintf("\"%s\"!", ipVal)}
-	act, err := ParseAndReplace(input, envVars)
-	if err != nil {
-		t.Fatalf("Failed to parse valid input args %v: %v", input, err)
-	}
+	act := ParseAndReplace(input, envVars)
 
 	if !reflect.DeepEqual(act, exp) {
 		t.Fatalf("ParseAndReplace(%v, %v) returned %#v; want %#v", input, envVars, act, exp)
@@ -49,10 +43,7 @@ func TestDriverArgs_ParseAndReplaceValidEnv(t *testing.T) {
 func TestDriverArgs_ParseAndReplaceChainedEnv(t *testing.T) {
 	input := []string{"-foo", fmt.Sprintf("$%s$%s", ipKey, portKey)}
 	exp := []string{"-foo", fmt.Sprintf("%s%s", ipVal, portVal)}
-	act, err := ParseAndReplace(input, envVars)
-	if err != nil {
-		t.Fatalf("Failed to parse valid input args %v: %v", input, err)
-	}
+	act := ParseAndReplace(input, envVars)
 
 	if !reflect.DeepEqual(act, exp) {
 		t.Fatalf("ParseAndReplace(%v, %v) returned %#v; want %#v", input, envVars, act, exp)
diff --git a/client/driver/docker.go b/client/driver/docker.go
index 69aea2b73..4aa97e13b 100644
--- a/client/driver/docker.go
+++ b/client/driver/docker.go
@@ -293,10 +293,7 @@ func (d *DockerDriver) createContainer(ctx *ExecContext, task *structs.Task, dri
 		config.ExposedPorts = exposedPorts
 	}
 
-	parsedArgs, err := args.ParseAndReplace(driverConfig.Args, env.Map())
-	if err != nil {
-		return c, err
-	}
+	parsedArgs := args.ParseAndReplace(driverConfig.Args, env.Map())
 
 	// If the user specified a custom command to run as their entrypoint, we'll
 	// inject it here.
diff --git a/client/driver/executor/exec_basic.go b/client/driver/executor/exec_basic.go
index 8bf75c2ee..2ef4fbedc 100644
--- a/client/driver/executor/exec_basic.go
+++ b/client/driver/executor/exec_basic.go
@@ -62,11 +62,7 @@ func (e *BasicExecutor) Start() error {
 	}
 
 	e.cmd.Path = args.ReplaceEnv(e.cmd.Path, envVars.Map())
-	parsed, err := args.ParseAndReplace(e.cmd.Args, envVars.Map())
-	if err != nil {
-		return err
-	}
-	e.cmd.Args = parsed
+	e.cmd.Args = args.ParseAndReplace(e.cmd.Args, envVars.Map())
 
 	spawnState := filepath.Join(e.allocDir, fmt.Sprintf("%s_%s", e.taskName, "exit_status"))
 	e.spawn = spawn.NewSpawner(spawnState)
diff --git a/client/driver/executor/exec_linux.go b/client/driver/executor/exec_linux.go
index c2f2931c0..43c9270e0 100644
--- a/client/driver/executor/exec_linux.go
+++ b/client/driver/executor/exec_linux.go
@@ -167,11 +167,7 @@ func (e *LinuxExecutor) Start() error {
 	}
 
 	e.cmd.Path = args.ReplaceEnv(e.cmd.Path, envVars.Map())
-	parsed, err := args.ParseAndReplace(e.cmd.Args, envVars.Map())
-	if err != nil {
-		return err
-	}
-	e.cmd.Args = parsed
+	e.cmd.Args = args.ParseAndReplace(e.cmd.Args, envVars.Map())
 
 	spawnState := filepath.Join(e.allocDir, fmt.Sprintf("%s_%s", e.taskName, "exit_status"))
 	e.spawn = spawn.NewSpawner(spawnState)
diff --git a/client/driver/rkt.go b/client/driver/rkt.go
index d86129656..1fb6e9e06 100644
--- a/client/driver/rkt.go
+++ b/client/driver/rkt.go
@@ -151,10 +151,7 @@ func (d *RktDriver) Start(ctx *ExecContext, task *structs.Task) (DriverHandle, e
 
 	// Add user passed arguments.
 	if len(driverConfig.Args) != 0 {
-		parsed, err := args.ParseAndReplace(driverConfig.Args, envVars.Map())
-		if err != nil {
-			return nil, err
-		}
+		parsed := args.ParseAndReplace(driverConfig.Args, envVars.Map())
 
 		// Need to start arguments with "--"
 		if len(parsed) > 0 {