diff --git a/packages/testcontainers/src/container-runtime/image-name.test.ts b/packages/testcontainers/src/container-runtime/image-name.test.ts
index 9710f75e..6c251959 100644
--- a/packages/testcontainers/src/container-runtime/image-name.test.ts
+++ b/packages/testcontainers/src/container-runtime/image-name.test.ts
@@ -54,10 +54,10 @@ describe("ContainerImage", () => {
       expect(imageName.string).toBe("aa285b773a2c042056883845aea893a743d358a5d40f61734fa228fde93dae6f:1");
     });
 
-    it("should substitute no registry with the one provided via TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX", () => {
+    it.each(['custom.com/registry', 'custom.com/registry/'])("should substitute no registry with the one provided via TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX", (customRegistry: string) => {
       const oldEnvValue = process.env.TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX;
       try {
-        process.env.TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX = "custom.com/registry";
+        process.env.TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX = customRegistry;
         const imageName = new ImageName(undefined, "image", "tag");
         expect(imageName.string).toBe("custom.com/registry/image:tag");
       } finally {
diff --git a/packages/testcontainers/src/container-runtime/image-name.ts b/packages/testcontainers/src/container-runtime/image-name.ts
index 306e7b60..569a44e0 100644
--- a/packages/testcontainers/src/container-runtime/image-name.ts
+++ b/packages/testcontainers/src/container-runtime/image-name.ts
@@ -10,11 +10,9 @@ export class ImageName {
     public readonly image: string,
     public readonly tag: string
   ) {
-    if (!this.registry) {
-      this.registry = process.env.TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX;
-      if (this.registry) {
-        log.info(`Applying changes to image ${image} with tag ${tag}: added registry ${this.registry}`);
-      }
+    if (!this.registry && process.env.TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX) {
+      this.registry = process.env.TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX.replace(/\/$/, "");
+      log.info(`Applying changes to image ${image} with tag ${tag}: added registry ${this.registry}`);
     }
     if (this.registry) {
       if (this.tag.startsWith("sha256:")) {