diff --git a/.changeset/chatty-vans-cross.md b/.changeset/chatty-vans-cross.md
new file mode 100644
index 0000000000..fab7af5155
--- /dev/null
+++ b/.changeset/chatty-vans-cross.md
@@ -0,0 +1,5 @@
+---
+'@backstage/integration': patch
+---
+
+Fixed an issue with resolution of SCM URLs against a base URL with a trailing slash.
diff --git a/packages/integration/src/helpers.ts b/packages/integration/src/helpers.ts
index 94aafaa6c3..b403155cc5 100644
--- a/packages/integration/src/helpers.ts
+++ b/packages/integration/src/helpers.ts
@@ -84,8 +84,10 @@ export function defaultScmResolveUrl(options: {
 
   if (url.startsWith('/')) {
     // If it is an absolute path, move relative to the repo root
-    const { filepath } = parseGitUrl(base);
-    updated = new URL(base);
+    const { href, filepath } = parseGitUrl(base);
+
+    updated = new URL(href);
+
     const repoRootPath = trimEnd(
       updated.pathname.substring(0, updated.pathname.length - filepath.length),
       '/',