diff --git a/lldb/packages/Python/lldbsuite/test/configuration.py b/lldb/packages/Python/lldbsuite/test/configuration.py
index 69ed9fc32e2b..d797b17c164e 100644
--- a/lldb/packages/Python/lldbsuite/test/configuration.py
+++ b/lldb/packages/Python/lldbsuite/test/configuration.py
@@ -100,6 +100,15 @@ regexp = None
 # run.  Use '-s session-dir-name' to specify a specific dir name.
 sdir_name = None
 
+# Valid options:
+# f - test file name (without extension)
+# n - test class name
+# m - test method name
+# a - architecture
+# c - compiler path
+# The default is to write all fields.
+session_file_format = 'fnmac'
+
 # Set this flag if there is any session info dumped during the test run.
 sdir_has_content = False
 
diff --git a/lldb/packages/Python/lldbsuite/test/dosep.py b/lldb/packages/Python/lldbsuite/test/dosep.py
index 7d9dcd938aab..37ca91adb140 100644
--- a/lldb/packages/Python/lldbsuite/test/dosep.py
+++ b/lldb/packages/Python/lldbsuite/test/dosep.py
@@ -426,6 +426,7 @@ def process_dir(root, files, dotest_argv, inferior_pid_events):
         script_file = main.__file__
         command = ([sys.executable, script_file] +
                    dotest_argv +
+                   ["-S", dotest_options.session_file_format] +
                    ["--inferior", "-p", base_name, root])
 
         timeout_name = os.path.basename(os.path.splitext(base_name)[0]).upper()
diff --git a/lldb/packages/Python/lldbsuite/test/dotest.py b/lldb/packages/Python/lldbsuite/test/dotest.py
index bffdf41709cf..702e57e99871 100644
--- a/lldb/packages/Python/lldbsuite/test/dotest.py
+++ b/lldb/packages/Python/lldbsuite/test/dotest.py
@@ -321,6 +321,7 @@ def parseOptionsAndInitTestdirs():
         if args.s.startswith('-'):
             usage(parser)
         configuration.sdir_name = args.s
+    configuration.session_file_format = args.session_file_format
 
     if args.t:
         os.environ['LLDB_COMMAND_TRACE'] = 'YES'
diff --git a/lldb/packages/Python/lldbsuite/test/dotest_args.py b/lldb/packages/Python/lldbsuite/test/dotest_args.py
index 105156df7e84..8bbc29c98f00 100644
--- a/lldb/packages/Python/lldbsuite/test/dotest_args.py
+++ b/lldb/packages/Python/lldbsuite/test/dotest_args.py
@@ -11,6 +11,7 @@ import textwrap
 # Third-party modules
 
 # LLDB modules
+from . import configuration
 
 class ArgParseNamespace(object):
     pass
@@ -70,6 +71,7 @@ def create_parser():
     group.add_argument('--framework', metavar='framework-path', help='The path to LLDB.framework')
     group.add_argument('--executable', metavar='executable-path', help='The path to the lldb executable')
     group.add_argument('-s', metavar='name', help='Specify the name of the dir created to store the session files of tests with errored or failed status. If not specified, the test driver uses the timestamp as the session dir name')
+    group.add_argument('-S', '--session-file-format', default=configuration.session_file_format, metavar='format', help='Specify session file name format.  See configuration.py for a description.')
     group.add_argument('-y', type=int, metavar='count', help="Specify the iteration count used to collect our benchmarks. An example is the number of times to do 'thread step-over' to measure stepping speed.")
     group.add_argument('-#', type=int, metavar='sharp', dest='sharp', help='Repeat the test suite for a specified number of times')
     group.add_argument('--channel', metavar='channel', dest='channels', action='append', help=textwrap.dedent("Specify the log channels (and optional categories) e.g. 'lldb all' or 'gdb-remote packets' if no categories are specified, 'default' is used"))
diff --git a/lldb/packages/Python/lldbsuite/test/lldbtest.py b/lldb/packages/Python/lldbsuite/test/lldbtest.py
index 14b9876e4071..b9168ec1fbd3 100644
--- a/lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ b/lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -962,19 +962,27 @@ class Base(unittest2.TestCase):
         if not os.path.isdir(dname):
             os.mkdir(dname)
 
-        compiler = self.getCompiler()
-
-        if compiler[1] == ':':
-            compiler = compiler[2:]
-        if os.path.altsep is not None:
-            compiler = compiler.replace(os.path.altsep, os.path.sep)
-
-        fname = "{}-{}-{}".format(self.id(), self.getArchitecture(), "_".join(compiler.split(os.path.sep)))
-        if len(fname) > 200:
-            fname = "{}-{}-{}".format(self.id(), self.getArchitecture(), compiler.split(os.path.sep)[-1])
-
+        components = []
         if prefix is not None:
-            fname = "{}-{}".format(prefix, fname)
+            components.append(prefix)
+        for c in configuration.session_file_format:
+            if c == 'f':
+                components.append(self.__class__.__module__)
+            elif c == 'n':
+                components.append(self.__class__.__name__)
+            elif c == 'c':
+                compiler = self.getCompiler()
+
+                if compiler[1] == ':':
+                    compiler = compiler[2:]
+                if os.path.altsep is not None:
+                    compiler = compiler.replace(os.path.altsep, os.path.sep)
+                components.extend([x for x in compiler.split(os.path.sep) if x != ""])
+            elif c == 'a':
+                components.append(self.getArchitecture())
+            elif c == 'm':
+                components.append(self.testMethodName)
+        fname = "-".join(components)
 
         return os.path.join(dname, fname)
 
diff --git a/lldb/test/CMakeLists.txt b/lldb/test/CMakeLists.txt
index 1397c664d758..1fdb495f4f5a 100644
--- a/lldb/test/CMakeLists.txt
+++ b/lldb/test/CMakeLists.txt
@@ -38,6 +38,7 @@ set(LLDB_TEST_COMMON_ARGS
   ${CMAKE_BINARY_DIR}/bin/lldb${CMAKE_EXECUTABLE_SUFFIX}
   -s
   ${CMAKE_BINARY_DIR}/lldb-test-traces
+  -S nm
   -u CXXFLAGS
   -u CFLAGS
   )