@@ -16,14 +16,18 @@ func TestLogsContainerSmallerThanPage(t *testing.T) {

 	testLen := 32767

 	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sh", "-c", fmt.Sprintf("for i in $(seq 1 %d); do echo -n =; done; echo", testLen))

 	out, _, _, err := runCommandWithStdoutStderr(runCmd)

-	errorOut(err, t, fmt.Sprintf("run failed with errors: %v", err))

+	if err != nil {

+		t.Fatalf("run failed with errors: %s, %v", out, err)

+	}

 	cleanedContainerID := stripTrailingCharacters(out)

 	exec.Command(dockerBinary, "wait", cleanedContainerID).Run()

 	logsCmd := exec.Command(dockerBinary, "logs", cleanedContainerID)

 	out, _, _, err = runCommandWithStdoutStderr(logsCmd)

-	errorOut(err, t, fmt.Sprintf("failed to log container: %v %v", out, err))

+	if err != nil {

+		t.Fatalf("failed to log container: %s, %v", out, err)

+	}

 	if len(out) != testLen+1 {

 		t.Fatalf("Expected log length of %d, received %d\n", testLen+1, len(out))

@@ -39,14 +43,18 @@ func TestLogsContainerBiggerThanPage(t *testing.T) {

 	testLen := 32768

 	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sh", "-c", fmt.Sprintf("for i in $(seq 1 %d); do echo -n =; done; echo", testLen))

 	out, _, _, err := runCommandWithStdoutStderr(runCmd)

-	errorOut(err, t, fmt.Sprintf("run failed with errors: %v", err))

+	if err != nil {

+		t.Fatalf("run failed with errors: %s, %v", out, err)

+	}

 	cleanedContainerID := stripTrailingCharacters(out)

 	exec.Command(dockerBinary, "wait", cleanedContainerID).Run()

 	logsCmd := exec.Command(dockerBinary, "logs", cleanedContainerID)

 	out, _, _, err = runCommandWithStdoutStderr(logsCmd)

-	errorOut(err, t, fmt.Sprintf("failed to log container: %v %v", out, err))

+	if err != nil {

+		t.Fatalf("failed to log container: %s, %v", out, err)

+	}

 	if len(out) != testLen+1 {

 		t.Fatalf("Expected log length of %d, received %d\n", testLen+1, len(out))

@@ -62,14 +70,18 @@ func TestLogsContainerMuchBiggerThanPage(t *testing.T) {

 	testLen := 33000

 	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sh", "-c", fmt.Sprintf("for i in $(seq 1 %d); do echo -n =; done; echo", testLen))

 	out, _, _, err := runCommandWithStdoutStderr(runCmd)

-	errorOut(err, t, fmt.Sprintf("run failed with errors: %v", err))

+	if err != nil {

+		t.Fatalf("run failed with errors: %s, %v", out, err)

+	}

 	cleanedContainerID := stripTrailingCharacters(out)

 	exec.Command(dockerBinary, "wait", cleanedContainerID).Run()

 	logsCmd := exec.Command(dockerBinary, "logs", cleanedContainerID)

 	out, _, _, err = runCommandWithStdoutStderr(logsCmd)

-	errorOut(err, t, fmt.Sprintf("failed to log container: %v %v", out, err))

+	if err != nil {

+		t.Fatalf("failed to log container: %s, %v", out, err)

+	}

 	if len(out) != testLen+1 {

 		t.Fatalf("Expected log length of %d, received %d\n", testLen+1, len(out))

@@ -85,14 +97,18 @@ func TestLogsTimestamps(t *testing.T) {

 	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sh", "-c", fmt.Sprintf("for i in $(seq 1 %d); do echo =; done;", testLen))

 	out, _, _, err := runCommandWithStdoutStderr(runCmd)

-	errorOut(err, t, fmt.Sprintf("run failed with errors: %v", err))

+	if err != nil {

+		t.Fatalf("run failed with errors: %s, %v", out, err)

+	}

 	cleanedContainerID := stripTrailingCharacters(out)

 	exec.Command(dockerBinary, "wait", cleanedContainerID).Run()

 	logsCmd := exec.Command(dockerBinary, "logs", "-t", cleanedContainerID)

 	out, _, _, err = runCommandWithStdoutStderr(logsCmd)

-	errorOut(err, t, fmt.Sprintf("failed to log container: %v %v", out, err))

+	if err != nil {

+		t.Fatalf("failed to log container: %s, %v", out, err)

+	}

 	lines := strings.Split(out, "\n")

@@ -124,14 +140,18 @@ func TestLogsSeparateStderr(t *testing.T) {

 	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sh", "-c", fmt.Sprintf("echo %s 1>&2", msg))

 	out, _, _, err := runCommandWithStdoutStderr(runCmd)

-	errorOut(err, t, fmt.Sprintf("run failed with errors: %v", err))

+	if err != nil {

+		t.Fatalf("run failed with errors: %s, %v", out, err)

+	}

 	cleanedContainerID := stripTrailingCharacters(out)

 	exec.Command(dockerBinary, "wait", cleanedContainerID).Run()

 	logsCmd := exec.Command(dockerBinary, "logs", cleanedContainerID)

 	stdout, stderr, _, err := runCommandWithStdoutStderr(logsCmd)

-	errorOut(err, t, fmt.Sprintf("failed to log container: %v %v", out, err))

+	if err != nil {

+		t.Fatalf("failed to log container: %s, %v", out, err)

+	}

 	if stdout != "" {

 		t.Fatalf("Expected empty stdout stream, got %v", stdout)

@@ -152,14 +172,18 @@ func TestLogsStderrInStdout(t *testing.T) {

 	runCmd := exec.Command(dockerBinary, "run", "-d", "-t", "busybox", "sh", "-c", fmt.Sprintf("echo %s 1>&2", msg))

 	out, _, _, err := runCommandWithStdoutStderr(runCmd)

-	errorOut(err, t, fmt.Sprintf("run failed with errors: %v", err))

+	if err != nil {

+		t.Fatalf("run failed with errors: %s, %v", out, err)

+	}

 	cleanedContainerID := stripTrailingCharacters(out)

 	exec.Command(dockerBinary, "wait", cleanedContainerID).Run()

 	logsCmd := exec.Command(dockerBinary, "logs", cleanedContainerID)

 	stdout, stderr, _, err := runCommandWithStdoutStderr(logsCmd)

-	errorOut(err, t, fmt.Sprintf("failed to log container: %v %v", out, err))

+	if err != nil {

+		t.Fatalf("failed to log container: %s, %v", out, err)

+	}

 	if stderr != "" {

 		t.Fatalf("Expected empty stderr stream, got %v", stdout)

@@ -180,14 +204,18 @@ func TestLogsTail(t *testing.T) {

 	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sh", "-c", fmt.Sprintf("for i in $(seq 1 %d); do echo =; done;", testLen))

 	out, _, _, err := runCommandWithStdoutStderr(runCmd)

-	errorOut(err, t, fmt.Sprintf("run failed with errors: %v", err))

+	if err != nil {

+		t.Fatalf("run failed with errors: %s, %v", out, err)

+	}

 	cleanedContainerID := stripTrailingCharacters(out)

 	exec.Command(dockerBinary, "wait", cleanedContainerID).Run()

 	logsCmd := exec.Command(dockerBinary, "logs", "--tail", "5", cleanedContainerID)

 	out, _, _, err = runCommandWithStdoutStderr(logsCmd)

-	errorOut(err, t, fmt.Sprintf("failed to log container: %v %v", out, err))

+	if err != nil {

+		t.Fatalf("failed to log container: %s, %v", out, err)

+	}

 	lines := strings.Split(out, "\n")

@@ -197,7 +225,9 @@ func TestLogsTail(t *testing.T) {

 	logsCmd = exec.Command(dockerBinary, "logs", "--tail", "all", cleanedContainerID)

 	out, _, _, err = runCommandWithStdoutStderr(logsCmd)

-	errorOut(err, t, fmt.Sprintf("failed to log container: %v %v", out, err))

+	if err != nil {

+		t.Fatalf("failed to log container: %s, %v", out, err)

+	}

 	lines = strings.Split(out, "\n")

@@ -207,7 +237,9 @@ func TestLogsTail(t *testing.T) {

 	logsCmd = exec.Command(dockerBinary, "logs", "--tail", "random", cleanedContainerID)

 	out, _, _, err = runCommandWithStdoutStderr(logsCmd)

-	errorOut(err, t, fmt.Sprintf("failed to log container: %v %v", out, err))

+	if err != nil {

+		t.Fatalf("failed to log container: %s, %v", out, err)

+	}

 	lines = strings.Split(out, "\n")

@@ -223,7 +255,9 @@ func TestLogsFollowStopped(t *testing.T) {

 	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "echo", "hello")

 	out, _, _, err := runCommandWithStdoutStderr(runCmd)

-	errorOut(err, t, fmt.Sprintf("run failed with errors: %v", err))

+	if err != nil {

+		t.Fatalf("run failed with errors: %s, %v", out, err)

+	}

 	cleanedContainerID := stripTrailingCharacters(out)

 	exec.Command(dockerBinary, "wait", cleanedContainerID).Run()