diff --git a/docker.go b/docker.go
index 252d94ec7c..2633408be6 100644
--- a/docker.go
+++ b/docker.go
@@ -32,8 +32,8 @@ import (
 
 	tcexec "github.com/testcontainers/testcontainers-go/exec"
 	"github.com/testcontainers/testcontainers-go/internal/config"
+	"github.com/testcontainers/testcontainers-go/internal/core"
 	"github.com/testcontainers/testcontainers-go/internal/testcontainersdocker"
-	"github.com/testcontainers/testcontainers-go/internal/testcontainerssession"
 	"github.com/testcontainers/testcontainers-go/wait"
 )
 
@@ -877,7 +877,7 @@ func (p *DockerProvider) CreateContainer(ctx context.Context, req ContainerReque
 	// the reaper does not need to start a reaper for itself
 	isReaperContainer := strings.HasSuffix(imageName, config.ReaperDefaultImage)
 	if !tcConfig.RyukDisabled && !isReaperContainer {
-		r, err := reuseOrCreateReaper(context.WithValue(ctx, testcontainersdocker.DockerHostContextKey, p.host), testcontainerssession.SessionID(), p)
+		r, err := reuseOrCreateReaper(context.WithValue(ctx, testcontainersdocker.DockerHostContextKey, p.host), core.SessionID(), p)
 		if err != nil {
 			return nil, fmt.Errorf("%w: creating reaper failed", err)
 		}
@@ -973,7 +973,7 @@ func (p *DockerProvider) CreateContainer(ctx context.Context, req ContainerReque
 
 	if !isReaperContainer {
 		// add the labels that the reaper will use to terminate the container to the request
-		for k, v := range testcontainersdocker.DefaultLabels(testcontainerssession.SessionID()) {
+		for k, v := range testcontainersdocker.DefaultLabels(core.SessionID()) {
 			req.Labels[k] = v
 		}
 	}
@@ -1080,7 +1080,7 @@ func (p *DockerProvider) CreateContainer(ctx context.Context, req ContainerReque
 		Image:             imageName,
 		imageWasBuilt:     req.ShouldBuildImage(),
 		keepBuiltImage:    req.ShouldKeepBuiltImage(),
-		sessionID:         testcontainerssession.SessionID(),
+		sessionID:         core.SessionID(),
 		provider:          p,
 		terminationSignal: termSignal,
 		stopProducer:      nil,
@@ -1127,7 +1127,7 @@ func (p *DockerProvider) ReuseOrCreateContainer(ctx context.Context, req Contain
 		return p.CreateContainer(ctx, req)
 	}
 
-	sessionID := testcontainerssession.SessionID()
+	sessionID := core.SessionID()
 
 	tcConfig := p.Config().Config
 
@@ -1298,7 +1298,7 @@ func (p *DockerProvider) CreateNetwork(ctx context.Context, req NetworkRequest)
 		IPAM:           req.IPAM,
 	}
 
-	sessionID := testcontainerssession.SessionID()
+	sessionID := core.SessionID()
 
 	var termSignal chan bool
 	if !tcConfig.RyukDisabled {
@@ -1409,7 +1409,7 @@ func (p *DockerProvider) getDefaultNetwork(ctx context.Context, cli client.APICl
 		_, err = cli.NetworkCreate(ctx, reaperNetwork, types.NetworkCreate{
 			Driver:     Bridge,
 			Attachable: true,
-			Labels:     testcontainersdocker.DefaultLabels(testcontainerssession.SessionID()),
+			Labels:     testcontainersdocker.DefaultLabels(core.SessionID()),
 		})
 
 		if err != nil {
@@ -1440,7 +1440,7 @@ func containerFromDockerResponse(ctx context.Context, response types.Container)
 	}
 	container.provider = provider
 
-	container.sessionID = testcontainerssession.SessionID()
+	container.sessionID = core.SessionID()
 	container.consumers = []LogConsumer{}
 	container.stopProducer = nil
 	container.isRunning = response.State == "running"
diff --git a/docker_client.go b/docker_client.go
index 87ea18192b..6523040ffb 100644
--- a/docker_client.go
+++ b/docker_client.go
@@ -10,8 +10,8 @@ import (
 	"github.com/docker/docker/api/types/registry"
 	"github.com/docker/docker/client"
 
+	"github.com/testcontainers/testcontainers-go/internal/core"
 	"github.com/testcontainers/testcontainers-go/internal/testcontainersdocker"
-	"github.com/testcontainers/testcontainers-go/internal/testcontainerssession"
 )
 
 // DockerClient is a wrapper around the docker client that is used by testcontainers-go.
@@ -68,8 +68,8 @@ func (c *DockerClient) Info(ctx context.Context) (types.Info, error) {
 		dockerInfo.OperatingSystem, dockerInfo.MemTotal/1024/1024,
 		testcontainersdocker.ExtractDockerHost(ctx),
 		testcontainersdocker.ExtractDockerSocket(ctx),
-		testcontainerssession.SessionID(),
-		testcontainerssession.ProcessID(),
+		core.SessionID(),
+		core.ProcessID(),
 	)
 
 	return dockerInfo, nil
diff --git a/generic.go b/generic.go
index 837d0191f7..bd5f34c8e7 100644
--- a/generic.go
+++ b/generic.go
@@ -6,8 +6,8 @@ import (
 	"fmt"
 	"sync"
 
+	"github.com/testcontainers/testcontainers-go/internal/core"
 	"github.com/testcontainers/testcontainers-go/internal/testcontainersdocker"
-	"github.com/testcontainers/testcontainers-go/internal/testcontainerssession"
 )
 
 var (
@@ -94,5 +94,5 @@ type GenericProvider interface {
 
 // GenericLabels returns a map of labels that can be used to identify containers created by this library
 func GenericLabels() map[string]string {
-	return testcontainersdocker.DefaultLabels(testcontainerssession.SessionID())
+	return testcontainersdocker.DefaultLabels(core.SessionID())
 }
diff --git a/internal/testcontainerssession/session.go b/internal/core/bootstrap.go
similarity index 79%
rename from internal/testcontainerssession/session.go
rename to internal/core/bootstrap.go
index 7ce57d6c27..cf06dde7e2 100644
--- a/internal/testcontainerssession/session.go
+++ b/internal/core/bootstrap.go
@@ -1,4 +1,4 @@
-package testcontainerssession
+package core
 
 import (
 	"crypto/sha256"
@@ -32,6 +32,11 @@ import (
 //   - tag the containers created by testcontainers-go, adding a label to the container with the session ID.
 var sessionID string
 
+// projectPath returns the current working directory of the parent test process running Testcontainers for Go.
+// If it's not possible to get that directory, the library will use the current working directory. If again
+// it's not possible to get the current working directory, the library will use a temporary directory.
+var projectPath string
+
 // processID returns a unique ID for the current test process. Because each Go package will be run in a separate process,
 // we need a way to identify the current test process, in the form of an UUID
 var processID string
@@ -43,10 +48,16 @@ func init() {
 
 	parentPid := os.Getppid()
 	var createTime int64
+	fallbackCwd, err := os.Getwd()
+	if err != nil {
+		// very unlinke to fail, but if it does, we will use a temp dir
+		fallbackCwd = os.TempDir()
+	}
 
 	processes, err := process.Processes()
 	if err != nil {
 		sessionID = uuid.New().String()
+		projectPath = fallbackCwd
 		return
 	}
 
@@ -55,6 +66,12 @@ func init() {
 			continue
 		}
 
+		cwd, err := p.Cwd()
+		if err != nil {
+			cwd = fallbackCwd
+		}
+		projectPath = cwd
+
 		t, err := p.CreateTime()
 		if err != nil {
 			sessionID = uuid.New().String()
@@ -79,6 +96,10 @@ func ProcessID() string {
 	return processID
 }
 
+func ProjectPath() string {
+	return projectPath
+}
+
 func SessionID() string {
 	return sessionID
 }
diff --git a/internal/testcontainersdocker/client.go b/internal/testcontainersdocker/client.go
index e4b871400d..44f7f2c2f4 100644
--- a/internal/testcontainersdocker/client.go
+++ b/internal/testcontainersdocker/client.go
@@ -8,7 +8,7 @@ import (
 
 	"github.com/testcontainers/testcontainers-go/internal"
 	"github.com/testcontainers/testcontainers-go/internal/config"
-	"github.com/testcontainers/testcontainers-go/internal/testcontainerssession"
+	"github.com/testcontainers/testcontainers-go/internal/core"
 )
 
 // NewClient returns a new docker client extracting the docker host from the different alternatives
@@ -33,7 +33,8 @@ func NewClient(ctx context.Context, ops ...client.Opt) (*client.Client, error) {
 
 	opts = append(opts, client.WithHTTPHeaders(
 		map[string]string{
-			"x-tc-sid":   testcontainerssession.SessionID(),
+			"x-tc-pp":    core.ProjectPath(),
+			"x-tc-sid":   core.SessionID(),
 			"User-Agent": "tc-go/" + internal.Version,
 		}),
 	)
diff --git a/reaper_test.go b/reaper_test.go
index 4657e1ba09..1090afd181 100644
--- a/reaper_test.go
+++ b/reaper_test.go
@@ -15,8 +15,8 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/testcontainers/testcontainers-go/internal/config"
+	"github.com/testcontainers/testcontainers-go/internal/core"
 	"github.com/testcontainers/testcontainers-go/internal/testcontainersdocker"
-	"github.com/testcontainers/testcontainers-go/internal/testcontainerssession"
 	"github.com/testcontainers/testcontainers-go/wait"
 )
 
@@ -134,7 +134,7 @@ func TestContainerStartsWithoutTheReaper(t *testing.T) {
 	require.NoError(t, err)
 	terminateContainerOnEnd(t, ctx, container)
 
-	sessionID := testcontainerssession.SessionID()
+	sessionID := core.SessionID()
 
 	reaperContainer, err := lookUpReaperContainer(ctx, sessionID)
 	if err != nil {
@@ -169,7 +169,7 @@ func TestContainerStartsWithTheReaper(t *testing.T) {
 	}
 	terminateContainerOnEnd(t, ctx, c)
 
-	sessionID := testcontainerssession.SessionID()
+	sessionID := core.SessionID()
 
 	reaperContainer, err := lookUpReaperContainer(ctx, sessionID)
 	if err != nil {
diff --git a/testcontainer.go b/testcontainer.go
index 3410e06b80..0b39231533 100644
--- a/testcontainer.go
+++ b/testcontainer.go
@@ -1,6 +1,6 @@
 package testcontainers
 
-import "github.com/testcontainers/testcontainers-go/internal/testcontainerssession"
+import "github.com/testcontainers/testcontainers-go/internal/core"
 
 // SessionID returns a unique session ID for the current test session. Because each Go package
 // will be run in a separate process, we need a way to identify the current test session.
@@ -24,5 +24,5 @@ import "github.com/testcontainers/testcontainers-go/internal/testcontainerssessi
 //   - identify the test session, aggregating the test execution of multiple packages in the same test session.
 //   - tag the containers created by testcontainers-go, adding a label to the container with the session ID.
 func SessionID() string {
-	return testcontainerssession.SessionID()
+	return core.SessionID()
 }