diff --git a/tests/blob_example.cc b/tests/blob_example.cc
index 3436c0d2..08be965f 100644
--- a/tests/blob_example.cc
+++ b/tests/blob_example.cc
@@ -52,7 +52,7 @@ int main()
 		//}
 
 	}
-	catch(sqlite_exception e)
+	catch(const sqlite_exception& e)
 	{
 		cout << "Unexpected error " << e.what() << endl;
 		exit(EXIT_FAILURE);
diff --git a/tests/flags.cc b/tests/flags.cc
index 77cb03d2..cdfec0b4 100644
--- a/tests/flags.cc
+++ b/tests/flags.cc
@@ -92,7 +92,7 @@ int main()
 			} catch(errors::readonly&) {}
 		}
 	}
-	catch(sqlite_exception e)
+	catch(const sqlite_exception& e)
 	{
 		cout << "Unexpected error " << e.what() << endl;
 		exit(EXIT_FAILURE);
diff --git a/tests/functions.cc b/tests/functions.cc
index ef8b1e28..c9ac57a9 100644
--- a/tests/functions.cc
+++ b/tests/functions.cc
@@ -52,7 +52,7 @@ int main()
       cout << number << "! = " << factorial << '\n';
     };
 	}
-	catch(sqlite_exception e)
+	catch(const sqlite_exception& e)
 	{
 		cout << "Unexpected error " << e.what() << endl;
 		exit(EXIT_FAILURE);
diff --git a/tests/functors.cc b/tests/functors.cc
index cc8b8a86..4778ed1a 100644
--- a/tests/functors.cc
+++ b/tests/functors.cc
@@ -43,7 +43,7 @@ int main() {
     }
 
   }
-  catch(sqlite_exception e) {
+  catch(const sqlite_exception& e) {
     cout << "Unexpected error " << e.what() << endl;
     exit(EXIT_FAILURE);
   }
diff --git a/tests/mov_ctor.cc b/tests/mov_ctor.cc
index 9b807e90..414dda4c 100644
--- a/tests/mov_ctor.cc
+++ b/tests/mov_ctor.cc
@@ -24,7 +24,7 @@ int main() {
   try {
   	dbFront dbf;
   }
-  catch(sqlite_exception e) {
+  catch(const sqlite_exception& e) {
     cout << "Unexpected error " << e.what() << endl;
     exit(EXIT_FAILURE);
   }
diff --git a/tests/nullptr_uniqueptr.cc b/tests/nullptr_uniqueptr.cc
index 70294f8d..178b5621 100644
--- a/tests/nullptr_uniqueptr.cc
+++ b/tests/nullptr_uniqueptr.cc
@@ -35,7 +35,7 @@ int main() {
       cout << "OK all three values are nullptr" << endl;
     };
 
-  } catch(sqlite_exception e) {
+  } catch(const sqlite_exception& e) {
     cout << "Sqlite error " << e.what() << endl;
     exit(EXIT_FAILURE);
   } catch(...) {
diff --git a/tests/prepared_statment.cc b/tests/prepared_statment.cc
index 8080f0ca..64e8c260 100644
--- a/tests/prepared_statment.cc
+++ b/tests/prepared_statment.cc
@@ -85,7 +85,7 @@ int main() {
 		}
 
 
-	} catch(sqlite_exception e) {
+	} catch(const sqlite_exception& e) {
 		cout << "Unexpected error " << e.what() << endl;
 		exit(EXIT_FAILURE);
 	} catch(...) {
diff --git a/tests/shared_connection.cc b/tests/shared_connection.cc
index e8ba5cb5..60cf40b4 100644
--- a/tests/shared_connection.cc
+++ b/tests/shared_connection.cc
@@ -29,7 +29,7 @@ int main() {
 		}
 
 
-	} catch(sqlite_exception e) {
+	} catch(const sqlite_exception& e) {
 		cout << "Unexpected error " << e.what() << endl;
 		exit(EXIT_FAILURE);
 	} catch(...) {
diff --git a/tests/simple_examples.cc b/tests/simple_examples.cc
index be2040c0..7abf6374 100644
--- a/tests/simple_examples.cc
+++ b/tests/simple_examples.cc
@@ -31,7 +31,7 @@ int main()
 		if(test != 2) exit(EXIT_FAILURE);
 		
 	}
-	catch(sqlite_exception e)
+	catch(const sqlite_exception& e)
 	{
 		cout << "Unexpected error " << e.what() << endl;
 		exit(EXIT_FAILURE);
diff --git a/tests/sqlcipher.cc b/tests/sqlcipher.cc
index eb1e259a..e9f95148 100644
--- a/tests/sqlcipher.cc
+++ b/tests/sqlcipher.cc
@@ -58,7 +58,7 @@ int main()
 		  db << "INSERT INTO foo VALUES (?, ?)" << 3 << "fail";
 		}
 	}
-	catch(sqlite_exception e)
+	catch(const sqlite_exception& e)
 	{
 		cout << "Unexpected error " << e.what() << endl;
 		exit(EXIT_FAILURE);
diff --git a/tests/variant.cc b/tests/variant.cc
index 916faaf9..2091d8b2 100644
--- a/tests/variant.cc
+++ b/tests/variant.cc
@@ -38,7 +38,7 @@ int main()
 			exit(EXIT_FAILURE);
 		}
 	}
-	catch(sqlite_exception e)
+	catch(const sqlite_exception& e)
 	{
 		cout << "Unexpected error " << e.what() << endl;
 		exit(EXIT_FAILURE);