C++ :: Function Non-class Type?

My g++ compiler is telling me that said printTest() is not part of the class. I have presented it in header class and implemented it in .cpp class but still keep getting the error. Compile and compile error -

blackjack > g++ -Wextra -pedantic -std=c++11 Deck.h Deck.cpp test.cpp ;
test.cpp: In function ‘int main()’:
test.cpp:6:6: error: request for member ‘printTest’ in ‘test’, which is of non-class type ‘Deck()’
test.printTest();

My Code -

//Deck.h
#include <iostream>
#include <string>
class Deck{
public:
Deck();
void printTest();

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