diff --git a/tycho-gpg-plugin/src/main/java/org/eclipse/tycho/gpg/SignRepositoryArtifactsMojo.java b/tycho-gpg-plugin/src/main/java/org/eclipse/tycho/gpg/SignRepositoryArtifactsMojo.java
index 62639d8486..ae6e7ddc59 100644
--- a/tycho-gpg-plugin/src/main/java/org/eclipse/tycho/gpg/SignRepositoryArtifactsMojo.java
+++ b/tycho-gpg-plugin/src/main/java/org/eclipse/tycho/gpg/SignRepositoryArtifactsMojo.java
@@ -16,6 +16,7 @@
 
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugin.MojoFailureException;
+import org.apache.maven.plugin.logging.Log;
 import org.apache.maven.plugins.annotations.Component;
 import org.apache.maven.plugins.annotations.LifecyclePhase;
 import org.apache.maven.plugins.annotations.Mojo;
@@ -231,11 +232,13 @@ public void execute() throws MojoExecutionException, MojoFailureException {
 
     private void handle(IArtifactDescriptor artifactDescriptor, File artifact, ProxySignerWithPublicKeyAccess signer,
             KeyStore allKeys) {
+        Log log = getLog();
         if (artifact != null) {
             var existingKeys = artifactDescriptor.getProperty(PGPSignatureVerifier.PGP_SIGNER_KEYS_PROPERTY_NAME);
             var existingSignatures = artifactDescriptor.getProperty(PGPSignatureVerifier.PGP_SIGNATURES_PROPERTY_NAME);
 
             if (existingSignatures != null && pgpKeyBehavior == PGPKeyBehavior.skip) {
+                log.debug(artifact + " is already pgp signed and these should be skipped!");
                 return;
             }
 
@@ -245,6 +248,7 @@ private void handle(IArtifactDescriptor artifactDescriptor, File artifact, Proxy
                 var classifier = artifactKey.getClassifier();
                 var isBinary = "binary".equals(classifier);
                 if (skipBinaries && isBinary) {
+                    log.debug(artifact + " is a binary and these should be skipped!");
                     return;
                 }
 
@@ -253,11 +257,14 @@ private void handle(IArtifactDescriptor artifactDescriptor, File artifact, Proxy
                         var signedContent = signedContentFactory.getSignedContent(artifact);
                         if (signedContent.isSigned()) {
                             if (skipIfJarsigned) {
+                                log.debug(artifact + " is already signed and signed jars should be skipped!");
                                 return;
                             }
                             if (skipIfJarsignedAndAnchored) {
                                 for (var signerInfo : signedContent.getSignerInfos()) {
                                     if (signerInfo.getTrustAnchor() != null) {
+                                        log.debug(artifact
+                                                + " is already signed and signed jars should be skipped if anchored!");
                                         return;
                                     }
                                 }
@@ -265,6 +272,7 @@ private void handle(IArtifactDescriptor artifactDescriptor, File artifact, Proxy
                         }
                     } catch (Exception e) {
                         //$FALL-THROUGH$ Treat as unsigned.
+                        log.error("Can't check signature " + artifact + " :: " + e);
                     }
                 }
             }
@@ -294,6 +302,8 @@ private void handle(IArtifactDescriptor artifactDescriptor, File artifact, Proxy
             } catch (MojoExecutionException | IOException e) {
                 throw new RuntimeException(e.getMessage(), e);
             }
+        } else {
+            log.error("No artifact file for " + artifactDescriptor);
         }
     }
 }
diff --git a/tycho-its/src/test/java/org/eclipse/tycho/test/pgp/TestPGPSigning.java b/tycho-its/src/test/java/org/eclipse/tycho/test/pgp/TestPGPSigning.java
index fc93e0992a..cb798f654b 100644
--- a/tycho-its/src/test/java/org/eclipse/tycho/test/pgp/TestPGPSigning.java
+++ b/tycho-its/src/test/java/org/eclipse/tycho/test/pgp/TestPGPSigning.java
@@ -229,7 +229,8 @@ public void testSigningSkipIfJarSignedAndAnchored() throws Exception {
 
 		assertEquals(
 				"[org.eclipse.equinox.common, org.eclipse.equinox.common.source, org.eclipse.osgi, org.eclipse.osgi.source, org.eclipse.platform_root]",
-				data.unsignedIUs.toString(), "Unexpected unsigned IUs.");
+				data.unsignedIUs.toString(), "Unexpected unsigned IUs, log follows: " + System.lineSeparator()
+						+ getLogLines(verifier).stream().collect(Collectors.joining(System.lineSeparator())));
 
 		Set<String> signedIUs = data.signedIUs.keySet();
 		assertEquals(
diff --git a/tycho-testing-harness/src/main/java/org/eclipse/tycho/test/AbstractTychoIntegrationTest.java b/tycho-testing-harness/src/main/java/org/eclipse/tycho/test/AbstractTychoIntegrationTest.java
index 31ba59f72a..7fece5692f 100644
--- a/tycho-testing-harness/src/main/java/org/eclipse/tycho/test/AbstractTychoIntegrationTest.java
+++ b/tycho-testing-harness/src/main/java/org/eclipse/tycho/test/AbstractTychoIntegrationTest.java
@@ -249,7 +249,7 @@ protected String toURI(File file) throws IOException {
     }
 
     public static void verifyTextInLogMatches(Verifier verifier, Pattern pattern) throws VerificationException {
-        List<String> lines = verifier.loadFile(verifier.getBasedir(), verifier.getLogFileName(), false);
+        List<String> lines = getLogLines(verifier);
 
         for (String line : lines) {
             if (pattern.matcher(Verifier.stripAnsi(line)).find()) {
@@ -260,7 +260,7 @@ public static void verifyTextInLogMatches(Verifier verifier, Pattern pattern) th
     }
 
     public static void verifyTextNotInLog(Verifier verifier, String text) throws VerificationException {
-        List<String> lines = verifier.loadFile(verifier.getBasedir(), verifier.getLogFileName(), false);
+        List<String> lines = getLogLines(verifier);
 
         for (String line : lines) {
             if (Verifier.stripAnsi(line).contains(text)) {
@@ -269,6 +269,10 @@ public static void verifyTextNotInLog(Verifier verifier, String text) throws Ver
         }
     }
 
+    public static List<String> getLogLines(Verifier verifier) throws VerificationException {
+        return verifier.loadFile(verifier.getBasedir(), verifier.getLogFileName(), false);
+    }
+
     /**
      * Variant of verifyErrorFreeLog that do not skip stacktraces
      * 
@@ -276,7 +280,7 @@ public static void verifyTextNotInLog(Verifier verifier, String text) throws Ver
      * @throws VerificationException
      */
     protected static void verifyErrorFreeLog(Verifier verifier) throws VerificationException {
-        List<String> lines = verifier.loadFile(verifier.getBasedir(), verifier.getLogFileName(), false);
+        List<String> lines = getLogLines(verifier);
         int size = lines.size();
         Pattern pattern = Pattern.compile("\\[\\w+\\]");
         for (int i = 0; i < size; i++) {