diff --git a/ci/run_tests.sh b/ci/run_tests.sh
index ee46da9f52eab..27d3fcb4cf563 100755
--- a/ci/run_tests.sh
+++ b/ci/run_tests.sh
@@ -50,9 +50,10 @@ do
     # if no tests are found (the case of "single and slow"), pytest exits with code 5, and would make the script fail, if not for the below code
     sh -c "$PYTEST_CMD; ret=\$?; [ \$ret = 5 ] && exit 0 || exit \$ret"
 
-    if [[ "$COVERAGE" && $? == 0 ]]; then
-        echo "uploading coverage for $TYPE tests"
-        echo "bash <(curl -s https://codecov.io/bash) -Z -c -F $TYPE -f $COVERAGE_FNAME"
-              bash <(curl -s https://codecov.io/bash) -Z -c -F $TYPE -f $COVERAGE_FNAME
-    fi
+    # 2019-08-21 disabling because this is hitting HTTP 400 errors GH#27602
+    # if [[ "$COVERAGE" && $? == 0 && "$TRAVIS_BRANCH" == "master" ]]; then
+    #    echo "uploading coverage for $TYPE tests"
+    #    echo "bash <(curl -s https://codecov.io/bash) -Z -c -F $TYPE -f $COVERAGE_FNAME"
+    #          bash <(curl -s https://codecov.io/bash) -Z -c -F $TYPE -f $COVERAGE_FNAME
+    # fi
 done