diff --git a/.gitignore b/.gitignore
index e752b94a2..fcae925db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,3 +44,6 @@ docker/generated.mk
 
 # Vim backup files.
 .*.swp
+
+# Diff files from matplotlib
+*-failed-diff.png
diff --git a/analysis/test_data/pairwise_unique_coverage_heatmap-failed-diff.png b/analysis/test_data/pairwise_unique_coverage_heatmap-failed-diff.png
deleted file mode 100644
index 5dc618e44..000000000
Binary files a/analysis/test_data/pairwise_unique_coverage_heatmap-failed-diff.png and /dev/null differ
diff --git a/experiment/measurer/coverage_utils.py b/experiment/measurer/coverage_utils.py
index c6bd8bed1..c1115b9e5 100644
--- a/experiment/measurer/coverage_utils.py
+++ b/experiment/measurer/coverage_utils.py
@@ -150,18 +150,11 @@ def generate_coverage_summary_json(self):
     def generate_coverage_report(self):
         """Generates the coverage report and stores in bucket."""
         command = [
-            'llvm-cov',
-            'show',
-            '-format=html',
+            'llvm-cov', 'show', '-no-warn', '-format=html',
             f'-path-equivalence=/,{self.source_files_dir}',
-            f'-output-dir={self.report_dir}',
-            '-Xdemangler',
-            'c++filt',
-            '-Xdemangler',
-            '-n',
-            self.binary_file,
-            f'-instr-profile={self.merged_profdata_file}',
-            '-no-warn'
+            f'-output-dir={self.report_dir}', '-Xdemangler', 'c++filt',
+            '-Xdemangler', '-n', self.binary_file,
+            f'-instr-profile={self.merged_profdata_file}'
         ]
         result = new_process.execute(command, expect_zero=False)
         if result.retcode != 0:
@@ -265,15 +258,9 @@ def generate_json_summary(coverage_binary,
     """Generates the json summary file from |coverage_binary|
     and |profdata_file|."""
     command = [
-        'llvm-cov',
-        'export',
-        '-format=text',
-        '-num-threads=1',
-        '-region-coverage-gt=0',
-        '-skip-expansions',
-        coverage_binary,
-        f'-instr-profile={profdata_file}',
-        '-no-warn'
+        'llvm-cov', 'export', '-no-warn', '-format=text', '-num-threads=1',
+        '-region-coverage-gt=0', '-skip-expansions', coverage_binary,
+        f'-instr-profile={profdata_file}'
     ]
 
     if summary_only:
diff --git a/experiment/measurer/measure_manager.py b/experiment/measurer/measure_manager.py
index 7c16edd2f..82baf0a9d 100644
--- a/experiment/measurer/measure_manager.py
+++ b/experiment/measurer/measure_manager.py
@@ -16,6 +16,7 @@
 import collections
 import gc
 import glob
+import gzip
 import multiprocessing
 import json
 import os
@@ -614,16 +615,28 @@ def measure_snapshot_coverage(  # pylint: disable=too-many-locals
     # Generate profdata and transform it into json form.
     snapshot_measurer.generate_coverage_information(cycle)
 
-    # Save profdata snapshot.
-    coverage_archive_dst = exp_path.filestore(
-        os.path.join(snapshot_measurer.trial_dir, 'coverage',
-                     experiment_utils.get_coverage_archive_name(cycle)))
-    if filestore_utils.cp(snapshot_measurer.cov_summary_file,
+    # Compress and save the exported profdata snapshot.
+    coverage_archive_zipped = os.path.join(
+        snapshot_measurer.trial_dir, 'coverage',
+        experiment_utils.get_coverage_archive_name(cycle) + '.gz')
+
+    coverage_archive_dir = os.path.dirname(coverage_archive_zipped)
+    if not os.path.exists(coverage_archive_dir):
+        os.makedirs(coverage_archive_dir)
+
+    with gzip.open(str(coverage_archive_zipped), 'wb') as compressed:
+        with open(snapshot_measurer.cov_summary_file, 'rb') as uncompressed:
+            compressed.write(uncompressed.read())
+
+    coverage_archive_dst = exp_path.filestore(coverage_archive_zipped)
+    if filestore_utils.cp(coverage_archive_zipped,
                           coverage_archive_dst,
                           expect_zero=False).retcode:
         snapshot_logger.warning('Coverage not found for cycle: %d.', cycle)
         return None
 
+    os.remove(coverage_archive_zipped)  # no reason to keep this around
+
     # Run crashes again, parse stacktraces and generate crash signatures.
     crashes = snapshot_measurer.process_crashes(cycle)
 
diff --git a/experiment/measurer/test_measure_manager.py b/experiment/measurer/test_measure_manager.py
index c812239ec..033736faf 100644
--- a/experiment/measurer/test_measure_manager.py
+++ b/experiment/measurer/test_measure_manager.py
@@ -153,11 +153,10 @@ def test_generate_summary(mocked_get_coverage_binary, mocked_execute,
     snapshot_measurer.generate_summary(CYCLE)
 
     expected = [
-        'llvm-cov', 'export', '-format=text', '-num-threads=1',
+        'llvm-cov', 'export', '-no-warn', '-format=text', '-num-threads=1',
         '-region-coverage-gt=0', '-skip-expansions',
         '/work/coverage-binaries/benchmark-a/fuzz-target',
-        '-instr-profile=/reports/data.profdata',
-        '-no-warn'
+        '-instr-profile=/reports/data.profdata'
     ]
 
     assert (len(mocked_execute.call_args_list)) == 1
diff --git a/requirements.txt b/requirements.txt
index 56b835357..ca7b933cf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ redis==4.3.4
 rq==1.11.1
 scikit-posthocs==0.7.0
 scipy==1.9.2
-seaborn==0.12.0
+seaborn==0.13.2
 sqlalchemy==1.4.41
 protobuf==3.20.3