diff --git a/news/2 Fixes/17270.md b/news/2 Fixes/17270.md
new file mode 100644
index 000000000000..fe0c948a4d71
--- /dev/null
+++ b/news/2 Fixes/17270.md	
@@ -0,0 +1 @@
+Fix for test result not found for files starting with py.
diff --git a/src/client/testing/testController/common/resultsHelper.ts b/src/client/testing/testController/common/resultsHelper.ts
index 0b35d7411c1d..7eaceeb398d0 100644
--- a/src/client/testing/testController/common/resultsHelper.ts
+++ b/src/client/testing/testController/common/resultsHelper.ts
@@ -97,7 +97,7 @@ export async function updateResultFromJunitXml(
             }
 
             const result = junitSuite.testcase.find((t) => {
-                const idResult = getRunIdFromRawData(`${t.$.classname}.${t.$.name}`);
+                const idResult = getRunIdFromRawData(`${t.$.classname}::${t.$.name}`);
                 const idNode = rawTestCaseNode.runId;
                 return idResult === idNode || idNode.endsWith(idResult);
             });
diff --git a/src/client/testing/testController/common/testItemUtilities.ts b/src/client/testing/testController/common/testItemUtilities.ts
index b20b8da4fac4..17bd171bbc50 100644
--- a/src/client/testing/testController/common/testItemUtilities.ts
+++ b/src/client/testing/testController/common/testItemUtilities.ts
@@ -88,9 +88,12 @@ function getRangeFromRawSource(raw: { source: string }): Range | undefined {
 }
 
 export function getRunIdFromRawData(id: string): string {
+    // TODO: This is a temporary solution to normalize test ids.
+    // The current method is error prone and easy to break. When we
+    // re-write the test adapters we should make sure we consider this.
     // This is the id that will be used to compare with the results.
     const runId = id
-        .replace(/\.py/g, '')
+        .replace(/\.py[^\w\-]/g, '') // we want to get rid of the `.py` in file names
         .replace(/[\\\:\/]/g, '.')
         .replace(/\:\:/g, '.')
         .replace(/\.\./g, '.');