diff --git a/lib/modules/manager/pep621/extract.spec.ts b/lib/modules/manager/pep621/extract.spec.ts
index e7147e912b4b72..d86e5d419ad7c1 100644
--- a/lib/modules/manager/pep621/extract.spec.ts
+++ b/lib/modules/manager/pep621/extract.spec.ts
@@ -134,14 +134,14 @@ describe('modules/manager/pep621/extract', () => {
           datasource: 'pypi',
           depType: 'project.optional-dependencies',
           currentValue: '>12',
-          depName: 'pytest/pytest',
+          depName: 'pytest',
         },
         {
           packageName: 'pytest-mock',
           datasource: 'pypi',
           depType: 'project.optional-dependencies',
           skipReason: 'unspecified-version',
-          depName: 'pytest/pytest-mock',
+          depName: 'pytest-mock',
         },
       ]);
 
@@ -154,28 +154,28 @@ describe('modules/manager/pep621/extract', () => {
           datasource: 'pypi',
           depType: 'tool.pdm.dev-dependencies',
           skipReason: 'unspecified-version',
-          depName: 'test/pdm',
+          depName: 'pdm',
         },
         {
           packageName: 'pytest-rerunfailures',
           datasource: 'pypi',
           depType: 'tool.pdm.dev-dependencies',
           currentValue: '>=10.2',
-          depName: 'test/pytest-rerunfailures',
+          depName: 'pytest-rerunfailures',
         },
         {
           packageName: 'tox',
           datasource: 'pypi',
           depType: 'tool.pdm.dev-dependencies',
           skipReason: 'unspecified-version',
-          depName: 'tox/tox',
+          depName: 'tox',
         },
         {
           packageName: 'tox-pdm',
           datasource: 'pypi',
           depType: 'tool.pdm.dev-dependencies',
           currentValue: '>=0.5',
-          depName: 'tox/tox-pdm',
+          depName: 'tox-pdm',
         },
       ]);
     });
@@ -214,7 +214,7 @@ describe('modules/manager/pep621/extract', () => {
           datasource: 'pypi',
           depType: 'project.optional-dependencies',
           currentValue: '>12',
-          depName: 'pytest/pytest',
+          depName: 'pytest',
           registryUrls: [
             'https://private-site.org/pypi/simple',
             'https://private.pypi.org/simple',
@@ -225,7 +225,7 @@ describe('modules/manager/pep621/extract', () => {
           datasource: 'pypi',
           depType: 'tool.pdm.dev-dependencies',
           currentValue: '>=10.2',
-          depName: 'test/pytest-rerunfailures',
+          depName: 'pytest-rerunfailures',
           registryUrls: [
             'https://private-site.org/pypi/simple',
             'https://private.pypi.org/simple',
@@ -236,7 +236,7 @@ describe('modules/manager/pep621/extract', () => {
           datasource: 'pypi',
           depType: 'tool.pdm.dev-dependencies',
           currentValue: '>=0.5',
-          depName: 'tox/tox-pdm',
+          depName: 'tox-pdm',
           registryUrls: [
             'https://private-site.org/pypi/simple',
             'https://private.pypi.org/simple',
diff --git a/lib/modules/manager/pep621/utils.ts b/lib/modules/manager/pep621/utils.ts
index d81deb8b987614..13293e38c20453 100644
--- a/lib/modules/manager/pep621/utils.ts
+++ b/lib/modules/manager/pep621/utils.ts
@@ -87,9 +87,9 @@ export function parseDependencyGroupRecord(
   }
 
   const deps: PackageDependency[] = [];
-  for (const [groupName, pep508Strings] of Object.entries(records)) {
+  for (const pep508Strings of Object.values(records)) {
     for (const dep of parseDependencyList(depType, pep508Strings)) {
-      deps.push({ ...dep, depName: `${groupName}/${dep.packageName!}` });
+      deps.push({ ...dep, depName: dep.packageName! });
     }
   }
   return deps;