diff --git a/src/main/java/testingbot/TestingBotReportFactory.java b/src/main/java/testingbot/TestingBotReportFactory.java
index f97d974..fd1c4b1 100644
--- a/src/main/java/testingbot/TestingBotReportFactory.java
+++ b/src/main/java/testingbot/TestingBotReportFactory.java
@@ -24,7 +24,7 @@ public TestingBotReportFactory(TestingBotCredentials credentials) {
         this.credentials = credentials;
     }
     
-    private static final Pattern SESSION_PATTERN = Pattern.compile("TestingBotSessionID=([A-Za-z0-9]+)");
+    private static final Pattern SESSION_PATTERN = Pattern.compile("TestingBotSessionID=([A-Za-z0-9_-]+)");
 
     public static List<String> findSessionIDs(CaseResult testResult) {
         List<String> sessions = new ArrayList<>();
diff --git a/src/test/java/testingbot/TestingBotSessionIdParsingTest.java b/src/test/java/testingbot/TestingBotSessionIdParsingTest.java
new file mode 100644
index 0000000..9285a97
--- /dev/null
+++ b/src/test/java/testingbot/TestingBotSessionIdParsingTest.java
@@ -0,0 +1,46 @@
+package testingbot;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.Test;
+
+/**
+ * Verifies the {@code TestingBotSessionID=} token parser accepts the full session
+ * id, including the hyphens present in modern WebDriver session ids. A truncated id
+ * would 404 against the TestingBot REST API and break every embedded report.
+ */
+public class TestingBotSessionIdParsingTest {
+
+    @Test
+    public void capturesHyphenatedSessionId() {
+        String sid = "b0dbacacfa63-342d529ca760-2f981532f469-178429199039-61532530";
+        List<String> found = new ArrayList<>();
+        TestingBotReportFactory.collectSessionIDs("TestingBotSessionID=" + sid, found);
+        assertThat(found).containsExactly(sid);
+    }
+
+    @Test
+    public void capturesPlainHexSessionId() {
+        List<String> found = new ArrayList<>();
+        TestingBotReportFactory.collectSessionIDs("log TestingBotSessionID=abc123DEF more", found);
+        assertThat(found).containsExactly("abc123DEF");
+    }
+
+    @Test
+    public void capturesMultipleSessionIds() {
+        List<String> found = new ArrayList<>();
+        TestingBotReportFactory.collectSessionIDs(
+                "TestingBotSessionID=aaa-111\nTestingBotSessionID=bbb-222\nTestingBotSessionID=abc_def-123",
+                found);
+        assertThat(found).containsExactly("aaa-111", "bbb-222", "abc_def-123");
+    }
+
+    @Test
+    public void ignoresTextWithoutToken() {
+        List<String> found = new ArrayList<>();
+        TestingBotReportFactory.collectSessionIDs("no session here", found);
+        assertThat(found).isEmpty();
+    }
+}