diff --git a/src/main/scala/scala/tools/partest/nest/AbstractRunner.scala b/src/main/scala/scala/tools/partest/nest/AbstractRunner.scala
index bfc364f..d26413c 100644
--- a/src/main/scala/scala/tools/partest/nest/AbstractRunner.scala
+++ b/src/main/scala/scala/tools/partest/nest/AbstractRunner.scala
@@ -94,6 +94,7 @@ abstract class AbstractRunner(argstr: String) extends {
     if (optVerbose)  NestUI.setVerbose()
     if (optTerse)    NestUI.setTerse()
     if (optShowDiff) NestUI.setDiffOnFail()
+    if (optShowLog)  NestUI.setLogOnFail()
 
     // Early return on no args, version, or invalid args
     if (optVersion) return echo(versionMsg)
diff --git a/src/main/scala/scala/tools/partest/nest/NestUI.scala b/src/main/scala/scala/tools/partest/nest/NestUI.scala
index a22351e..e70f4e9 100644
--- a/src/main/scala/scala/tools/partest/nest/NestUI.scala
+++ b/src/main/scala/scala/tools/partest/nest/NestUI.scala
@@ -73,25 +73,34 @@ object NestUI {
     f"$word $testNumber - $testIdent%-40s$reasonString"
   }
 
-  def reportTest(state: TestState) = {
+  def reportTest(state: TestState, info: TestInfo) =
     if (isTerse && state.isOk) {
       if (dotCount >= DotWidth) {
         outline("\n.")
         dotCount = 1
-      }
-      else {
+      } else {
         outline(".")
         dotCount += 1
       }
-    }
-    else {
+    } else {
       echo(statusLine(state))
-      if (!state.isOk && isDiffy) {
-        val differ = bold(red("% ")) + "diff "
-        state.transcript find (_ startsWith differ) foreach (echo(_))
+      if (!state.isOk) {
+        def showLog() = if (info.logFile.canRead) {
+          echo(bold(cyan(s"##### Log file '${info.logFile}' from failed test #####\n")))
+          echo(info.logFile.fileContents)
+        }
+        if (isDiffy) {
+          val differ = bold(red("% ")) + "diff "
+          val diffed = state.transcript find (_ startsWith differ)
+          diffed match {
+            case Some(diff) => echo(diff)
+            case None if !isLogging && !isPartestVerbose => showLog()
+            case _ => ()
+          }
+        }
+        if (isLogging) showLog()
       }
     }
-  }
 
   def echo(message: String): Unit = synchronized {
     leftFlush()
@@ -153,11 +162,13 @@ object NestUI {
   var _debug = false
   var _terse = false
   var _diff  = false
+  var _logging = false
 
   def isVerbose = _verbose
   def isDebug = _debug
   def isTerse = _terse
   def isDiffy = _diff
+  def isLogging = _logging
 
   def setVerbose() {
     _verbose = true
@@ -171,6 +182,9 @@ object NestUI {
   def setDiffOnFail() {
     _diff = true
   }
+  def setLogOnFail() {
+    _logging = true
+  }
   def verbose(msg: String) {
     if (isVerbose)
       System.err.println(msg)
diff --git a/src/main/scala/scala/tools/partest/nest/Runner.scala b/src/main/scala/scala/tools/partest/nest/Runner.scala
index d83a931..7a54ef0 100644
--- a/src/main/scala/scala/tools/partest/nest/Runner.scala
+++ b/src/main/scala/scala/tools/partest/nest/Runner.scala
@@ -42,8 +42,35 @@ class TestTranscript {
   }
 }
 
+trait TestInfo {
+  /** pos/t1234 */
+  def testIdent: String
+
+  /** pos */
+  def kind: String
+
+  // inputs
+
+  /** pos/t1234.scala or pos/t1234 if dir */
+  def testFile: File
+
+  /** pos/t1234.check */
+  def checkFile: File
+
+  /** pos/t1234.flags */
+  def flagsFile: File
+
+  // outputs
+
+  /** pos/t1234-pos.obj */
+  def outFile: File
+
+  /** pos/t1234-pos.log */
+  def logFile: File
+}
+
 /** Run a single test. Rubber meets road. */
-class Runner(val testFile: File, val suiteRunner: SuiteRunner) {
+class Runner(val testFile: File, val suiteRunner: SuiteRunner) extends TestInfo {
 
   import suiteRunner.{fileManager => fm, _}
   val fileManager = fm
@@ -802,7 +829,7 @@ class SuiteRunner(
           catch {
             case t: Throwable => throw new RuntimeException(s"Error running $testFile", t)
           }
-        NestUI.reportTest(state)
+        NestUI.reportTest(state, runner)
         runner.cleanup()
         state
       }
diff --git a/src/main/scala/scala/tools/partest/nest/RunnerSpec.scala b/src/main/scala/scala/tools/partest/nest/RunnerSpec.scala
index 46d0088..974a5e9 100644
--- a/src/main/scala/scala/tools/partest/nest/RunnerSpec.scala
+++ b/src/main/scala/scala/tools/partest/nest/RunnerSpec.scala
@@ -36,6 +36,7 @@ trait RunnerSpec extends Spec with Meta.StdOpts with Interpolation {
 
   heading("Test output options:")
   val optShowDiff     = "show-diff"    / "show diffs for failed tests"       --?
+  val optShowLog      = "show-log"     / "show log files for failed tests"   --?
   val optVerbose      = "verbose"      / "show verbose progress information" --?
   val optTerse        = "terse"        / "show terse progress information"   --?
   val optDebug        = "debug"        / "enable debugging output"           --?