diff --git a/spec/plsql/schema_spec.rb b/spec/plsql/schema_spec.rb
index d540e3e..13e138a 100644
--- a/spec/plsql/schema_spec.rb
+++ b/spec/plsql/schema_spec.rb
@@ -255,14 +255,14 @@ class TestModel < TestBaseModel
   it "should safely close cursors in threaded environment" do
     if (plsql.connection.database_version <=> [18, 0, 0, 0]) >= 0
       expect {
-        t1 = Thread.new { plsql.dbms_session.sleep(1) }.tap { |t| t.abort_on_exception = true }
-        t2 = Thread.new { plsql.dbms_session.sleep(2) }.tap { |t| t.abort_on_exception = true }
+        t1 = Thread.new { plsql.dbms_session.sleep(0.1) }.tap { |t| t.abort_on_exception = true }
+        t2 = Thread.new { plsql.dbms_session.sleep(0.2) }.tap { |t| t.abort_on_exception = true }
         [t2, t1].each { |t| t.join }
       }.not_to raise_error
     else
       expect {
-        t1 = Thread.new { plsql.dbms_lock.sleep(1) }.tap { |t| t.abort_on_exception = true }
-        t2 = Thread.new { plsql.dbms_lock.sleep(2) }.tap { |t| t.abort_on_exception = true }
+        t1 = Thread.new { plsql.dbms_lock.sleep(0.1) }.tap { |t| t.abort_on_exception = true }
+        t2 = Thread.new { plsql.dbms_lock.sleep(0.2) }.tap { |t| t.abort_on_exception = true }
         [t2, t1].each { |t| t.join }
       }.not_to raise_error
     end
@@ -352,7 +352,7 @@ class TestModel < TestBaseModel
 
     it "should log output when database version is less than 10.2" do
       allow(plsql.connection).to receive(:database_version).and_return([9, 2, 0, 0])
-      times = 2_000
+      times = 100
       plsql.test_dbms_output_large("1234567890", times)
       expect(@buffer.string).to eq("DBMS_OUTPUT: 1234567890\n" * times)
     end